Questions & Answers

Question
You are standing in a moving bus, facing forward, with closed-toe shoes on, and you suddenly fall forward as the bus comes to an immediate stop. What force caused you to fall forward?
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Answer
There is no force leading to your fall.
Question
A horizontal force accelerates a box from rest across a horizontal surface (friction is present) at a constant rate. The experiment is repeated, and all conditions remain the same with the exception that the horizontal force is doubled. What happens to the box's acceleration?
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Answer
It increases to more than double its original value.
Question
What is the mass of a person who weighs 110 lb?
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Answer
50 kg
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Question
A person rides in an elevator. If the mass of the person is 60.0 kg and the elevator accelerates downward with an acceleration of 4.90 m/s^2, what is the reading on the scale?
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Answer
883 N
Question
What is the conversion factor between km/hr^2 and m/s^2?
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Answer
7.72 x 10^-6 m/s^2
Question
A hot air balloon rises to an altitude of 600 fathoms. What is this height in feet? (1 fathom = 6 feet)
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Answer
3600 ft
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Question
Concrete is sold by the cubic yard. 5.00 cubic yards of concrete would equal how many cubic meters? (1m = 1.094 yds)
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Answer
3.82 m^3
Question
An average human heart has a heart rate of 70 beats per minute. Using that average how many times has a teenager's heart beaten over 17 years?
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Answer
6.3 x 10^8
Question
The radius of the earth is 3963 mi. (1mi = 1609m) If you jogged at a 10 min/mi pace, how many days would it take to jog around the world?
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Answer
173 days
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Question
Cystic fibrosis patients have a problem transporting chloride ions across plasma membranes. Which element in the membrane is defective in this case?
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Answer
A protein that allows chloride to pass across the membrane.There is no force leading to your fall.
Question
Why are the head groups of the phospholipids found on the exterior and the cytoplasmic side of the membrane?
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Answer
They are hydrophilic.There is no force leading to your fall.
Question
What role does the glycocalyx play in the plasma membrane?
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Answer
Signaling, lubrication, and cell adhesion.There is no force leading to your fall.
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Question
What prevents your immune system from attacking your own cells?
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Answer
Recognition proteins.There is no force leading to your fall.
Question
What is true about concerning membrane proteins?
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Answer
They can provide an anchor point for the cytoskeleton.There is no force leading to your fall.
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Question
In general, which of the following is largely responsible for moving substances across the plasma membrane, communicating with other cells, and identifying the cell?
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Answer
Proteins.There is no force leading to your fall.
Question
What is the fundamental property of molecules in solution that causes diffusion?
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Answer
Random motion.There is no force leading to your fall.
Question
What does the term "Free water" mean?
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Answer
Water that is not bound by a solute.There is no force leading to your fall.
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Question
Oxygen is to diffusion as bacteria are to ___________?
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Answer
Phagocytosis.There is no force leading to your fall.
Question
Which type of transport does NOT require the use of a transport protein?
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Answer
Simple diffusion.There is no force leading to your fall.
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Question
The glucose channel is to _________ as the sodium-potassium pump is to ____________?
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Answer
Facilitated diffusion; active transport.There is no force leading to your fall.
Question
Which of the following would be most likely to cross a bare lipid bilayer UNASSISTED?
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Answer
Oxygen.There is no force leading to your fall.
Question
Exocytosis moves __________?
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Answer
Waste materials out of the cell via a vesicle.There is no force leading to your fall.
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Question
In general, endocytosis and exocytosis are used for ___________?
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Answer
Moving substances that are too large for transport molecules.There is no force leading to your fall.
Question
What is the fundamental source of energy for most organisms on earth?
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Answer
The sun.There is no force leading to your fall.
Question
Define energy.
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Answer
The capacity to bring about movement against an opposing force.There is no force leading to your fall.
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Question
You're holding a bucket of water, which you then slowly poor over a wheel, causing it to spin. The water in the bucket has _______, whereas the moving wheel has ______.
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Answer
Potential energy; kinetic energy.There is no force leading to your fall.
Question
In an inefficient energy transfer, such as the transfer of chemical energy in gasoline to mechanical energy in a car, where does the excess energy go?
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Answer
It is converted to heat.There is no force leading to your fall.
Question
Breaking down a protein into individual amino acids is an example of what kind of reaction?
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Answer
Exergonic.There is no force leading to your fall.
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Question
Why is ATP considered the middleman for energy in living things?
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Answer
It transfers energy from food to other reactions.There is no force leading to your fall.
Question
What happens when a phosphate group is bonded to ADP?
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Answer
Energy will be consumed.There is no force leading to your fall.
Question
When ATP is used to fuel a reaction, what is/are the by-product(s)?
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Answer
ADP and phosphate.There is no force leading to your fall.
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Question
The substrate for the enzyme lactase is?
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Answer
Lactose.There is no force leading to your fall.
Question
People who are lactose intolerant are deficient in what?
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Answer
An enzyme.There is no force leading to your fall.
Question
The enzyme lactase ____________?
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Answer
Facilitates the breakdown of lactose.There is no force leading to your fall.
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Question
How do the enzymes lower the activation energy of a reaction?
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Answer
They bring the reactants into proper orientation for the reaction to take place.There is no force leading to your fall.
Question
Some enzymes need assistance from other molecules (such as vitamins) to facilitate the transformation of chemical reactants into products. These other molecules are collectively referred to as _________.
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Answer
Coenzymes.There is no force leading to your fall.
Question
In an enzyme, the region that catalyzes a reaction is known as the _______?
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Answer
Active site.There is no force leading to your fall.
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Question
The regulation of an enzyme's activity by means of a molecule binding to a site on the enzyme other than its active site is called ________?
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Answer
Allosteric regulation.There is no force leading to your fall.
Question
What role does oxygen play in the harvesting of energy?
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Answer
It is the final electron receptor in the process of cellular respiration.There is no force leading to your fall.
Question
When a molecule gains electrons, it has been ______. When a molecule loses electrons, it has been ______.
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Answer
Reduced; oxidized.There is no force leading to your fall.
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Question
Which of the following molecules serve as intermediate electron carriers in the process of cellular respiration?
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Answer
NAD+ and FAD molecules.There is no force leading to your fall.
Question
Electrons stripped from glucose during glycolysis and the Krebs cycle are transported to the electron transport chain by ______.
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Answer
NADHThere is no force leading to your fall.
Question
In cellular respiration, in what form is carbon released as waste?
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Answer
Carbon dioxide.There is no force leading to your fall.
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Question
Which stage of respiration do all organisms perform?
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Answer
Glycolysis.There is no force leading to your fall.
Question
The process of aerobic cellular respiration can be written as a chemical equation. Which of the following equations best represents the process of cellular respiration?
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Answer
C6H12O6 + 6 O2 + ADP → 6 CO2 + 6 H2O + ATPThere is no force leading to your fall.
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Question
Glycolysis yields _______?
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Answer
two molecules of pyruvate, two molecules of ATP, and two molecules of NADH.There is no force leading to your fall.
Question
How does the product of glycolysis enter the Krebs cycle?
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Answer
Attached to coenzyme A as acetyl-CoAThere is no force leading to your fall.
Question
Yeast produces ethanol as the waste product of glycolysis. Brewers grow yeast in oxygen-depleted conditions to optimize the production of ethanol. Why does this work?
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Answer
Without oxygen, the yeast can harvest energy only through glycolysis, because it is necessary for the other steps of cellular respiration.There is no force leading to your fall.
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Question
What is the ultimate destination of electrons stripped from glucose?
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Answer
Oxygen.There is no force leading to your fall.
Question
Where does the electron transport chain take place in the cell?
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Answer
In the inner membrane of the mitochondria.There is no force leading to your fall.
Question
At what point in a sustained bike ride would most of your energy be derived from aerobic processes?
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Answer
4 minutes because you are running on about 65% aerobic energy.There is no force leading to your fall.
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Question
What occurs when fats and proteins are metabolized?
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Answer
Fats and proteins enter cellular respiration at multiple different points.There is no force leading to your fall.
Question
Which of the following types of organisms are capable of carrying out photosynthesis?
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Answer
Plants, bacteria, and algae because it exists in all of the kingdoms except for animalia.There is no force leading to your fall.
Question
The role of antennae pigments in photosynthesis is to _____?
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Answer
Funnel light energy to chlorophyll.There is no force leading to your fall.
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Question
What solar wavelength would you expect to be LEAST used by plants for photosynthesis?
-
Answer
Green.There is no force leading to your fall.
Question
Why are photosynthesizing organisms mostly green?
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Answer
The elements of photosynthesis are designed to absorb blue and red light, not green.There is no force leading to your fall.
Question
The thousands of pores linking a leaf that allow for gas exchange in plants are known as ________?
-
Answer
Stomata.There is no force leading to your fall.
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Question
What is the ultimate source for electrons used in the light reactions?
-
Answer
Water.There is no force leading to your fall.
Question
Light hits photosystem II, causing electrons to be excited to a high energy level. These electrons are picked up by an electron acceptor and passed through an electron transport chain, where _____________ can be made.
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Answer
ATPThere is no force leading to your fall.
Question
What is the ultimate goal of the light reactions?
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Answer
The transformation of light energy into chemical energy.There is no force leading to your fall.
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Question
Why do plants split water molecules during the light reactions of photosynthesis?
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Answer
To provide electrons for the light reactions.There is no force leading to your fall.
Question
What is NOT part of the Calvin cycle?
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Answer
The production of ATP from ADP and phosphate.There is no force leading to your fall.
Question
Why is rubisco referred to in the text as the bridge between the living world and the non-living world?
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Answer
It is the protein that builds organic molecules from carbon dioxide.There is no force leading to your fall.
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Question
What is photorespiration?
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Answer
A turn of the Calvin cycle that fails to fix carbon.There is no force leading to your fall.
Question
In what organism is CAM metabolism most likely to occur?
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Answer
Prickly pear cactus because plants that are found in hot climates use CAM metabolism.There is no force leading to your fall.
Question
What is the molecule responsible for transmitting genetic material across generations?
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Answer
DNA.There is no force leading to your fall.
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Question
What is the relationship between the sequence of bases on a molecule of DNA and the proteins in a given cell?
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Answer
The bases on DNA are the code to produce proteins.There is no force leading to your fall.
Question
What is the sequence from genetic information to protein?
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Answer
DNA--mRNA--ribosome--proteinThere is no force leading to your fall.
Question
What is the complete collection of an organism's genetic information?
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Answer
Genome.There is no force leading to your fall.
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Question
Where are the instruction for producing enzymes located?
-
Answer
The genome of the cell.There is no force leading to your fall.
Question
What is contained in an organism's genome?
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Answer
The total genetic information for that organism.There is no force leading to your fall.
Question
Which of these statements is true regarding cell division in the body of a growing teenaged human?
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Answer
Only a subset of cells is diving at this point.There is no force leading to your fall.
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Question
Dividing cells must copy their DNA, known as _______, segregate DNA and other cellular components during________, and finally split apart during __________.
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Answer
replication; mitosis, cytokinesis.There is no force leading to your fall.
Question
In what form does the DNA in your cells exist?
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Answer
As a dense package of DNA and protein called chromosomes.There is no force leading to your fall.
Question
Our chromosomes exist as many sets of similar pairs, with the EXCEPTION of our _____?
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Answer
Sex Chromosomes.There is no force leading to your fall.
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Question
Which of the following items would you expect to find in a chromosome?
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Answer
DNA and protein.There is no force leading to your fall.
Question
What is the order or mitosis?
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Answer
Prophase, metaphase, anaphase, and telophase.There is no force leading to your fall.
Question
Which of the following phases of the cell cycle is the longest, in terms of time, for a typical cell?
-
Answer
Interphase.There is no force leading to your fall.
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Question
Plant cell mitosis is basically like animal cell mitosis EXCEPT that _________?
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Answer
Plant cells use a cell plate to separate daughter cells.There is no force leading to your fall.
Question
What is different about the DNA in bacterial cells compared with the DNA in eukaryotic cells?
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Answer
Bacterial DNA is circular, whereas eukaryotic DNA is linear.There is no force leading to your fall.
Question
What is the main difference between animal and plant cell divisions?
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Answer
Plants have to replicate a cell wall as well.There is no force leading to your fall.
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Question
Cell division in bacteria is known as ________?
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Answer
Binary fission.There is no force leading to your fall.
Question
What is FALSE about gametes?
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Answer
Gametes are NOT dipoid... They are 1N, haploid and are produced after the second meiotic division.There is no force leading to your fall.
Question
An organisim that reproduces sexually, such as a human, must produce cells that are ________?
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Answer
Haploid.There is no force leading to your fall.
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Question
What explains the products of a single cell that has gone through meiosis?
-
Answer
The daughter are haploid.There is no force leading to your fall.
Question
During which type(s) of cell division would you expect to see both tetrads and recombination?
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Answer
Meiosis I only.There is no force leading to your fall.
Question
During which type(s) of cell division does the DNA begin to condense into visible chromosomes, the nuclear membrane breaks apart into small vesicles, nucleoli disappear, and chromosomes are composed of two chromatids?
-
Answer
Meiosis I and mitosis only.There is no force leading to your fall.
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Question
Recombination is _______?
-
Answer
the swapping of DNA between homologous chromosomes.There is no force leading to your fall.
Question
The exchange of genetic material between homologous chromosomes that leads to new combinations of genetic material during meiosis is called ________.
-
Answer
Crossing over.There is no force leading to your fall.
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Question
Aside from crossing over, how many different chromosome combinations in a gamete can a human make?
-
Answer
8.4 Million.There is no force leading to your fall.
Question
A gamete from a human female contains ____________?
-
Answer
22 autosomes and an X chromosome.There is no force leading to your fall.
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Question
What is the order for spermatogenesis?
-
Answer
spermatogonium → primary spermatocyte → secondary spermatocyte → spermatidsThere is no force leading to your fall.
Question
One spermatogonium can produce _____ spermatid(s), and one oogonium can produce _____ egg(s).
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Answer
4; 1There is no force leading to your fall.
Question
What is the genetic disadvantage of asexual reproduction?
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Answer
There is never a new combination of genes.There is no force leading to your fall.
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Question
What is a hermaphrodite?
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Answer
An organism with both male and female reproductive elements.There is no force leading to your fall.
Question
High levels of carbon dioxide in the blood trigger which of th fllowing responses in the body?
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Answer
an increase in the rate of breathingThere is no force leading to your fall.
Question
which of the following is a function of the liver?
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Answer
removing toxic compounds from the bloodThere is no force leading to your fall.
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Question
Emphysema is a severe respiratory system disease. The diseases causes damage that directly prevents the transfer of oxygen to the bloodstream. which part of the respiratory system does emphysema damage?
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Answer
alveoliThere is no force leading to your fall.
Question
The sensory receptors int he carotid arteries and the aorta which determineswhen its time to exhale are triggered by
-
Answer
high levels of H+ in the bloodstreamThere is no force leading to your fall.
Question
the process of removivng metabolic wastes from the body is called
-
Answer
excretionThere is no force leading to your fall.
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Question
The actual site within the respiratory system where O2 and CO2 molecules are exchanged is the:
-
Answer
alveoliThere is no force leading to your fall.
Question
The molecule, which picks up O2 and drops off CO2 as it passes through the small blood vessels, which surround the alveoli in the lungs, is:
-
Answer
hemoglobinThere is no force leading to your fall.
Question
The functional unit of the kidney that is made of an arteriole, venule and collecting tubule is the:
-
Answer
nephronThere is no force leading to your fall.
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Question
The nose serves all the following functions except
-
Answer
transferring oxygen from the air to the bloodstreamThere is no force leading to your fall.
Question
The purpose of the respiratory system is to:
-
Answer
exchange O2 and CO2 with the environmentThere is no force leading to your fall.
Question
Which of the following organs removes extra water from the blood to keep the amount of fluid in the bloodstream at the proper level?
-
Answer
kidneysThere is no force leading to your fall.
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Question
Which of the following is a correct order in which air moves through the human respiratory system when a person inhales?
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Answer
nose, pharynx, larynx, trachea, bronchi, lungsThere is no force leading to your fall.
Question
The process that allows mostly water (99%) and other valuable solutes to find their way back into the bloodstream before being sent to the bladder by the kidneys is called:
-
Answer
reabsorbtionThere is no force leading to your fall.
Question
The principal component of the urine that is stored in the bladder before being excreted from the human body is:
-
Answer
ureaThere is no force leading to your fall.
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Question
Which of the following processes releases primarily oxygen into the atmosphere?
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Answer
photosynthesisThere is no force leading to your fall.
Question
The diagram at right shows part of the carbon cycle. If many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest?
-
Answer
decreased use of atmospheric CO2There is no force leading to your fall.
Question
Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following?
-
Answer
monosaccaridesThere is no force leading to your fall.
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Question
Which of the following colors of light contains the photons with the most energy:
-
Answer
greenThere is no force leading to your fall.
Question
Which is a product of the light-dependent reaction and is a reactant of the Calvin Cycle:
-
Answer
NADPHThere is no force leading to your fall.
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Question
How many turns of the Calvin Cycle must occur in order to make a single glucose with enough PGAL left over to ensure that the Cycle keeps going:
-
Answer
6There is no force leading to your fall.
Question
Which of the following pairs of substances are the reactants for photosynthesis:
-
Answer
CO2 and H2OThere is no force leading to your fall.
Question
The molecular origin of the oxygen that is a product of photosynthesis is:
-
Answer
waterThere is no force leading to your fall.
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Question
The name of the enzyme that slowly releases trapped H+ from the Thylakoid Disk, and which is therefore responsible for helping to form ATP is:
-
Answer
ATP synthaseThere is no force leading to your fall.
Question
In which of the following ways are photosynthesis and cellular respiration alike?
-
Answer
Both processes involve energy transformations.There is no force leading to your fall.
Question
The enzyme in the stroma of chloroplasts that is responsible for collecting the CO2 that is used to form carbohydrates is:
-
Answer
RubiscoThere is no force leading to your fall.
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Question
The process whereby H+ pass through a membrane protein from high to low concentration to assist in the making of ATP molecules is called:
-
Answer
chemiosmosisThere is no force leading to your fall.
Question
Pigments that absorb different wavelengths of light from those absorbed by Chlorophyll α are: a. the
-
Answer
accessory pigmentsThere is no force leading to your fall.
Question
Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?
-
Answer
lipidThere is no force leading to your fall.
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Question
Which of the following occurs during photosynthesis?
-
Answer
CO2 and H2O are converted to carbohydratesThere is no force leading to your fall.
Question
Which of the following statements best explains why offspring produced by sexual reproduction often look similar to, but not exactly the same as, their parents?
-
Answer
The offspring have genetic material from both the mother and the father.There is no force leading to your fall.
Question
The process by which a parent cell's cytoplasm splits in half is referred to as:
-
Answer
cytokinesisThere is no force leading to your fall.
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Question
Two chromosomes, which come from different parents, that are similar in shape and have the same sequences of similar genes along their length are:
-
Answer
homologousThere is no force leading to your fall.
Question
The "n" in the expression "2n" refers to :
-
Answer
the number of kinds of chromosomesThere is no force leading to your fall.
Question
Which type of cell must contain a mutation in order for the mutation to be passed from a woman to her offspring?
-
Answer
egg cellThere is no force leading to your fall.
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Question
A biological process is represented in the diagram at right. Which of the following concepts is best illustrated by the diagram?
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Answer
In sexual reproduction, the offspring receive the same number of chromosomes from each parent.There is no force leading to your fall.
Question
Which of the following is true the activities of a cell in the G2 of interphase:
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Answer
spindle fiber assemblyThere is no force leading to your fall.
Question
A cell which contains two copies of every kind of chromosome is said to be :
-
Answer
diploidThere is no force leading to your fall.
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Question
The phase of mitosis during which chromosomes line up in the middle of a cell is:
-
Answer
metaphaseThere is no force leading to your fall.
Question
The diagram at right shows the cell cycle. Which of the following activities occurs in the G1 phase?
-
Answer
growth of the cellThere is no force leading to your fall.
Question
A single prokaryotic cell can divide several times in an hour. Few eukaryotic cells can divide as quickly. Which of the following statements best explains this difference?
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Answer
Eukaryotic cells are more structurally complex than prokaryotic cellsThere is no force leading to your fall.
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Question
a carrot cell contains 18 chromosomes. which of the following diagrams illustrates the correct number of chromosomes in the new cells produced bt mitosis
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Answer
the one with 18 and 18There is no force leading to your fall.
Question
which of the following belongs to the oval marked X
-
Answer
zygoteThere is no force leading to your fall.
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Question
The event that results new combinations of genes forming along the lengths of homologous chromosomes in MEIOSIS 1 is:
-
Answer
crossing overThere is no force leading to your fall.
Question
The stage in a human's life when it is possible to produce gametes is:
-
Answer
pubertyThere is no force leading to your fall.
Question
Which of the following normally results from meiosis in a human cell that contains 46 chromosomes
-
Answer
a sperm cell with 23 chromosomesThere is no force leading to your fall.
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-
Question
The transfer of pollen from anther to stigma within the same flower:
-
Answer
self pollunationThere is no force leading to your fall.
Question
The position that a gene occupies on a chromosome is called its:
-
Answer
locusThere is no force leading to your fall.
Question
The two alleles that an organism has for a particular trait are referred to as its:
-
Answer
genotypeThere is no force leading to your fall.
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-
Question
The purpose of a testcross is to
-
Answer
determine the genotype of an organism that shows the dominant phenotypeThere is no force leading to your fall.
Question
The human, genetically-based, disease which prevents a person's blood from clotting when they are cut is:
-
Answer
all of the aboveThere is no force leading to your fall.
Question
In garden pea plants, the tall allele (T) is dominant to the short allele (t), and the round seed allele (R) is dominant to the wrinkled seed allele (r). Which of the following crosses could produce short pea plants with wrinkled seeds?
-
Answer
TtRr x TtrrThere is no force leading to your fall.
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-
Question
Two spotted leopards produce a litter of four cubs. Three of the cubs are spotted and one is solid black. The black coat is probably what type of trait?
-
Answer
recessiveThere is no force leading to your fall.
Question
In pea plants, the genes for seed color and seed shape are on different chromosomes. Which of the following explains why the genes for these traits are not inherited together?
-
Answer
the law of independent assortmentThere is no force leading to your fall.
Question
According to Mendel's law of segregation, which of the following statements describes what happens to the alleles of a gene pair?
-
Answer
The alleles are separated during gamete formationThere is no force leading to your fall.
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Question
An inherited metabolic disorder called phenylketonuria (PKU) can result in serious problems in infancy. The chance that two parents who are heterozygous will have a child with PKU is 25%. Which of the following terms best applies to the inheritance pattern for PKU?
-
Answer
recessiveThere is no force leading to your fall.
Question
In fruit flies, the gene for eye color is located on the X chromosome, and the red eye allele (R) is dominant to the white eye allele (r). A female fly with genotype XRXr is mated with a male fly with genotype XrY. Which of the following statements best describes the expected outcome of the cross?
-
Answer
The chance of an offspring having white eyes is 50%.There is no force leading to your fall.
Question
Height is a polygenic trait in humans. Which of the following statements best explains the genetics of this trait?
-
Answer
Height is controlled by more than one geneThere is no force leading to your fall.
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-
Question
In guinea pigs, the allele for black hair (B) is dominant to the allele for brown hair (b). Two black-haired guinea pigs are crossed. One of the guinea pigs is homozygous for black hair and one is heterozygous. What percentage of the offspring are expected to have black hair?
-
Answer
1There is no force leading to your fall.
Question
Based on the information in the table, which of the following describes alleles IA and IB? (see chart)
-
Answer
The IA and IB alleles show codominance. B.There is no force leading to your fall.
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Question
A pedigree is a diagram that traces the inheritance of a trait through a family. Which of the following patterns is typical in a pedigree for an autosomal dominant trait?
-
Answer
The trait appears in every generation.There is no force leading to your fall.
Question
Why is the particular sequence of bases in a segment of DNA important to cells?
-
Answer
Some base sequences code for protein productionThere is no force leading to your fall.
Question
The mold Aspergillus flavus grows on grain. A. flavus produces a toxin that binds to DNA in the bodies of animals that eat the grain. The binding of the toxin to DNA blocks transcription, so it directly interferes with the ability of an animal cell to do which of the following?
-
Answer
send protein-building instructions from the nucleus to the cytoplasm and ribosomesThere is no force leading to your fall.
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-
Question
A rare genetic condition causes dwarfism and immuno deficiencies. Which of the following is the most likely cause of this condition?
-
Answer
a mutation in DNAThere is no force leading to your fall.
Question
The two sides (backbones) of the DNA molecule are composed of :
-
Answer
alternating deoxyribose and phosphate functional groupsThere is no force leading to your fall.
Question
The enzyme, which is responsible for uncoiling the DNA molecule prior to replication is:
-
Answer
helicaseThere is no force leading to your fall.
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-
Question
In a eukaryotic cell, which of the following processes directly involves DNA?
-
Answer
replication of chromosomesThere is no force leading to your fall.
Question
During DNA replication, the wrong nucleotide was inserted in the DNA sequence. Which of the following terms describes this situation?
-
Answer
mutationThere is no force leading to your fall.
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-
Question
Which of the following statements explains why viruses are able to reproduce only inside host cells instead of being able to reproduce on their own?
-
Answer
Viruses lack the cellular machinery needed to make copies of their genetic materialThere is no force leading to your fall.
Question
A process is illustrated in the diagram below. Which process is illustrated in the diagram?
-
Answer
viral reproductionThere is no force leading to your fall.
Question
Fireflies produce light inside their bodies. The enzyme luciferase is involved in the reaction that produces the light. Scientists have isolated the luciferase gene. A scientist inserts the luciferase gene into the DNA of cells from another organism. If these cells produce light, the scientist knows that which of the following occurred?
-
Answer
The luciferase gene was transcribed and translated.There is no force leading to your fall.
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-
Question
In a molecule of double-stranded DNA, the amount of adenine present is always equal to the amount of
-
Answer
thymineThere is no force leading to your fall.
Question
Which of the following features of DNA is most important in determining the phenotype of an organism?
-
Answer
the sequence of nitrogenous basesThere is no force leading to your fall.
Question
A tomato plant in a greenhouse was found to be infected with tobacco mosaic virus. A few weeks later, nearby plants were also found to be infected with the virus. Which of the following best describes how the virus reproduced?
-
Answer
The virus used the host plant's resources and machinery to reproduce.There is no force leading to your fall.
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-
Question
Which of the following must be true of DNA as the Genetic material:
-
Answer
it must be able to copy itselfThere is no force leading to your fall.
Question
The four nitrogenous bases that Levene was able to detect in DNA are:
-
Answer
ATGCThere is no force leading to your fall.
Question
The process, first discovered by Griffith, which caused harmless bacteria to change into harmful forms is called:
-
Answer
transformationThere is no force leading to your fall.
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-
Question
Which of the following is the reason why viruses attack only specific kinds of cells:
-
Answer
they lock on to specific receptor sites of the host cellsThere is no force leading to your fall.
Question
Which of the following best describes the result of a mutation in an organism's DNA?
-
Answer
The mutation may cause phenotypic change.There is no force leading to your fall.
Question
Which of the following describes the function of DNA?
-
Answer
encoding genetic informationThere is no force leading to your fall.
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Question
Radon is a radioactive gas that is sometimes present in homes. If radon is inhaled, its decay products are deposited in the lungs. Radioactive particles can penetrate cells and cause changes to the cells' DNA. These changes in DNA are an example of which of the following?
-
Answer
transcriptionThere is no force leading to your fall.
Question
The enzyme, which assembles a new strand of DNA along an original DNA template is called:
-
Answer
DNA polymeraseThere is no force leading to your fall.
Question
The molecule which delivers amino acids to the protein factories of a cell is:
-
Answer
transfer RNAThere is no force leading to your fall.
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-
Question
Which of the following best explains how the fossil record provides evidence that evolution has occurred
-
Answer
It shows that the form and structure of groups of organisms have changed over time.There is no force leading to your fall.
Question
Which of the following provides the most conclusive evidence that organisms of two different species share a common ancestor?
-
Answer
They have similar DNA sequencesThere is no force leading to your fall.
Question
A group of interbreeding organisms is called a
-
Answer
speciesThere is no force leading to your fall.
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Question
Humming birds and Fuchsia plants demonstrate a type of evolution called:
-
Answer
coevolutionThere is no force leading to your fall.
Question
Antibiotic resistance can vary within a population of bacteria. The diagram to the right represents the changes in a population of bacteria as a result of exposure to an antibiotic over time. The changes in the population are most likely the result of which of the following?
-
Answer
natural selectionThere is no force leading to your fall.
Question
The fossil record supports which of the following descriptions of the evolution of life on Earth?
-
Answer
Complex organisms evolved from more simple organisms.There is no force leading to your fall.
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Question
Which of the following statements gives the most likely explanation for the presence of two very similar species of squirrels living on opposite sides of the Grand Canyon?
-
Answer
Members of a single squirrel species were geographically separated by the formation of the canyon.There is no force leading to your fall.
Question
All of the alleles for all of the genes in all individuals of a population is referred to as its:
-
Answer
gene poolThere is no force leading to your fall.
Question
When locust populations grow too large for an area, the individual locusts are crowded and food becomes scarce. In response to these conditions, some of the locusts leave the area and find a new habitat. Which of the following terms best applies to the response of the locusts that leave for the new habitat?
-
Answer
emigrationThere is no force leading to your fall.
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Question
The Asian shore crab invaded parts of the eastern coast of the United States about 15 years ago. The Asian shore crab preys on blue mussels. In the time since the Asian shore crab arrived, the average shell thickness has increased in the blue mussel population. Which of the following is the most likely reason that this increase in shell thickness has occurred?
-
Answer
Blue mussels with thick shells survive and reproduce more successfully than mussels without thick shells.There is no force leading to your fall.
Question
Frogs, lizards, and birds all have a similar arrangement of bones in their limbs. Which of the following does this similarity most likely indicate about these animals?
-
Answer
they have a common ancestryThere is no force leading to your fall.
Question
On island chains like the one shown, animal populations that spread from the main island to the other islands can evolve into separate species. Which of the following best explains what favors speciation in these situations?
-
Answer
The physical separation of the islands limits gene flow and interbreeding between the populations.There is no force leading to your fall.
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-
Question
Which of the following is the best scientific evidence that mammals evolved from reptiles?
-
Answer
fossils that show gradual changes in skull shape from reptile-like organisms to mammal-like organismsThere is no force leading to your fall.
Question
Which of the following statements best explains why the chestnut-sided warbler, Dendroica pensylvanica, and the cerulean warbler, Dendroica cerulea, are classified as closely related species?
-
Answer
They have similar DNA sequences.There is no force leading to your fall.
Question
In a population of moths, wing color became darker over time. Which of the following is the best evidence that the change in wing color was an evolutionary change?
-
Answer
The number of eggs that females laid during each breeding season increased.There is no force leading to your fall.
Question
An extinct shark named Scapanorhynchus sp. existed over100 million years ago. It had a long snout, sharp teeth, and a long tail fin. Which of the following statements explains how scientists most likely learned this information about Scapanorhynchus sp
-
Answer
They studied fossilized remains of ScapanorhynchusThere is no force leading to your fall.
Question
At one time, all the continents on Earth were joined in a supercontinent called Pangaea. Over time Pangaea split into separate continents. Which of the following statements describes a result of this split?
-
Answer
Ancestral organisms evolved into different species on the separated continentsThere is no force leading to your fall.
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Question
Scientific evidence shows that modern dogs, wolves, and foxes all have a common ancestor. Further evidence shows that dogs are more closely related to wolves than to foxes. Which of the following observations provides the best evidence that dogs are more closely related to wolves than to foxes?
-
Answer
The genetic sequences of dogs and wolves are more similar than the genetic sequences of dogs and foxesThere is no force leading to your fall.
Question
Which of the following is currently a primary cause of species decline worldwide?
-
Answer
habitat destructionThere is no force leading to your fall.
Question
The number of monarch butterflies counted in one location in the western United States dropped from 354,300 to 50,853 over a 10-year period. Which of the following statements best explains the drop in the number of monarch butterflies counted?
-
Answer
The death rate was greater than the birth rate.There is no force leading to your fall.
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Question
The diagram below shows many finch species that originated from a single ancestral finch species in the Galápagos Islands. Which of the following statements best explains why many different finch species originated from the single ancestral species?
-
Answer
Populations adapted to environmental pressures.There is no force leading to your fall.
Question
Whale fins and bat wings are anatomically similar. Which of the following does this suggest about the animals?
-
Answer
Whales and bats have a common ancestry.There is no force leading to your fall.
Question
The science of classifying living things is:
-
Answer
taxonomyThere is no force leading to your fall.
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-
Question
The only taxon that has a clear biological identity is:
-
Answer
speciesThere is no force leading to your fall.
Question
The three domains are:
-
Answer
Bacteria, Archea, EukaryaThere is no force leading to your fall.
Question
Which kingdom has some members that are unicellular, colonial and multicellular:
-
Answer
protistaThere is no force leading to your fall.
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Question
Organisms in the Domain Archea that can survive in hot springs, anoxic mud and very salty (brine) pools are referred to as:
-
Answer
extremophilesThere is no force leading to your fall.
Question
All organisms classified in kingdom Animalia must also be classified as which of the following?
-
Answer
eukaryotaThere is no force leading to your fall.
Question
Which of the following distinguishes the organisms in the kingdom Fungi from other eukaryotic organisms?
-
Answer
Fungi obtain nutrients by absorption.There is no force leading to your fall.
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Question
The scientific name for the cougar is Puma concolor. Which of the following organisms is most closely related to the cougar?
-
Answer
Puma yagouaroundiThere is no force leading to your fall.
Question
A scientist discovered a new organism in some caves in Pennsylvania. The organism has the following characteristics: It is multicellular, Its cells lack cell walls, It is motile, It is heterotrophic. Based on this information, to which kingdom does the organism belong?
-
Answer
animaliaThere is no force leading to your fall.
Question
Which of the following organisms is a prokaryote?
-
Answer
Thiopedia rosea, purple sulfur bacteriumThere is no force leading to your fall.
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Question
Which of the following is most important in classifying two groups of bears into the same genus?
-
Answer
similar genesThere is no force leading to your fall.
Question
A student views cells from several different prokaryotic and eukaryotic organisms under a high-powered microscope. Which of the following statements describes how the prokaryotic cells appear different from the eukaryotic cells?
-
Answer
The prokaryotic cells do not have nucleiThere is no force leading to your fall.
Question
A diagram of a body system is shown at right. Which of the following is a primary function of this system
-
Answer
supporting the weight of the bodyThere is no force leading to your fall.
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-
Question
A cell is shown in the diagram at right. Which of the following cell characteristics provides evidence that this cell comes from a plant and not from an animal?
-
Answer
a large vacuoleThere is no force leading to your fall.
Question
Long-tailed weasels and European otters are both classified into the family Mustelidae. Which of the following types of information was most likely used to classify these animals into the same family?
-
Answer
sketletal structureThere is no force leading to your fall.
Question
In the human respiratory system, the contraction and relaxation of a muscle called the diaphragm helps move air through which of the following structures?
-
Answer
larynx, pharynx, and tracheaThere is no force leading to your fall.
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Question
Which of the following statements is correct about the hierarchy of the taxonomic system currently used to classify organisms?
-
Answer
All organisms of a given phylum belong to the same kingdomThere is no force leading to your fall.
Question
The axial skeleton consists of which of the following bones
-
Answer
spineThere is no force leading to your fall.
Question
The type of joint which best describes the human hip joint is which of the following:
-
Answer
saddleThere is no force leading to your fall.
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Question
The type of muscle found in the intestines, which is not under voluntary control is called:
-
Answer
smoothThere is no force leading to your fall.
Question
Cardiac muscles contract without direct stimulation from the central nervous system because cardiac muscle cells:
-
Answer
have branching fibers that allow impulses to quickly travel from cell to cellThere is no force leading to your fall.
Question
Which of the following is one of the functions of the human skeleton?
-
Answer
providing a site for blood cell formation.There is no force leading to your fall.
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Question
Scientists are researching a way to regenerate cartilage. In a lab, cartilage-forming cells are grown on a synthetic carbon surface. If continued trials are successful, the synthetic surface can be applied to which of the following areas in the human body to treat cartilage damage or loss?
-
Answer
the ends of bonesThere is no force leading to your fall.
Question
When an ecosystem is limited by a single nutrient that is either scarce or cycles very slowly, this substance is called a:
-
Answer
limiting nutrientThere is no force leading to your fall.
Question
The main reservoir for nitrogen in the biosphere is:
-
Answer
the oceansThere is no force leading to your fall.
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-
Question
A type of symbiosis in which one organism benefits and the other is harmed is called:
-
Answer
parasitismThere is no force leading to your fall.
Question
Density—independent limiting factors include:
-
Answer
hurricanesThere is no force leading to your fall.
Question
The number of individuals of a single species per unit area is known as:
-
Answer
population densityThere is no force leading to your fall.
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-
Question
The maximum number of organisms of a particular species that a particular environment can support is called:
-
Answer
carrying capacityThere is no force leading to your fall.
Question
Many lichens are composed of fungi and algae. The fungi get sugars from the algae, and the algae get water, minerals, and proteins from the fungi. Which of the following terms best describes the relationship between the organisms in the lichens?
-
Answer
mutualismThere is no force leading to your fall.
Question
The illustration at right shows part of a clover root system. Two root nodules are labeled. The nodules contain which of the following to fix nitrogen for the plant?
-
Answer
gasesThere is no force leading to your fall.
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Question
Autotrophs are organisms that:
-
Answer
can use light to change inorganic molecules into organic moleculesThere is no force leading to your fall.
Question
A series of steps in which a large fish eats a small fish that has eaten algae is a:
-
Answer
food chainThere is no force leading to your fall.
Question
Nutrients move through an ecosystem in:
-
Answer
biogeochemical cyclesThere is no force leading to your fall.
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Question
A species whose population size is declining so rapidly that it could soon become extinct is said to be:
-
Answer
endangeredThere is no force leading to your fall.
Question
The process whereby concentrations of toxic substances increase in organisms at higher trophic levels in a food chain is called:
-
Answer
biological magnificationThere is no force leading to your fall.
Question
Which of the following can NOT act as producers in a food web
-
Answer
protistaThere is no force leading to your fall.
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Question
A relationship in which one organism is helped and another organism is neither helped nor hurt is:
-
Answer
commensalismThere is no force leading to your fall.
Question
Invasive species take on new habitats because:
-
Answer
the new habitat lacks parasites and predators that controlled their population back "home"There is no force leading to your fall.
Question
Which of the following relationships is an example of mutualism?
-
Answer
A bird eats food particles from a crocodile's teeth.There is no force leading to your fall.
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Question
In traditional landscaping, leaves are raked off the ground and bagged. In which of the following ways does this practice most significantly disrupt natural nutrient cycling?
-
Answer
It prevents carbon, oxygen, and nitrogen from being returned to the soil.There is no force leading to your fall.
Question
When locust populations grow too large for an area, the individual locusts are crowded and food becomes scarce. In response to these conditions, some of the locusts leave the area and find a new habitat. Which of the following terms best applies to the response of the locusts that leave for the new habitat?
-
Answer
emigrationThere is no force leading to your fall.
Question
Part of a desert food web is diagrammed at right. Which of the following will most likely result if all of the primary consumers are removed from this ecosystem?
-
Answer
Golden eagle and kit fox populations will decrease.There is no force leading to your fall.
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Question
In the past 100 years, levels of atmospheric carbon dioxide have increased as the result of the burning of fossil fuels. Other processes in the carbon cycle have absorbed some of the carbon released by this combustion. Which of the following most likely have absorbed excess carbon released by combustion
-
Answer
plantsThere is no force leading to your fall.
Question
Which of the following lists identifies organisms that are producers in food webs?
-
Answer
algae, ferns, sunflowersThere is no force leading to your fall.
Question
Which of the following human activities reduces biodiversity?
-
Answer
planting only red pine trees to replace native hardwood forests cut for lumberThere is no force leading to your fall.
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Question
A food web is shown at right. Which of the following organisms compete for the mouse as a food source?
-
Answer
hawk and snakeThere is no force leading to your fall.
Question
An example of a molecular compound is
-
Answer
NF₃There is no force leading to your fall.
Question
The number of bonding electrons in atoms of Group 6A elements is
-
Answer
2There is no force leading to your fall.
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-
Question
When an atom of calcium collides with an atom of oxygen, electron transfer takes place. The oxygen atom attains an electronic configuration identical to
-
Answer
neonThere is no force leading to your fall.
Question
List and briefly describe the 3 scientific ways of knowing.
-
Answer
Empirical- knowledge from an experiment Theoretical- understanding through observation and prediction Memorized- knowledge you memorize from a table or graph. ex: periodic tableThere is no force leading to your fall.
Question
The atom with the greatest attraction for a shared pair of electrons in a chemical bond could be an atom in the
-
Answer
upper right corner of the periodic table.There is no force leading to your fall.
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-
Question
The compound that contains a double bond is
-
Answer
C₂H₄There is no force leading to your fall.
Question
An ion results from
-
Answer
electrons transferring from one atom to another.There is no force leading to your fall.
Question
Use the following information to answer the question Substance 1 is CH4 Substance 2 is I2 Substance 3 is H2 Substance 4 is BF3 Substance 5 is H2S Substance 6 is C2H2 The substances that are linear in shape are
-
Answer
2, 3, and 6 onlyThere is no force leading to your fall.
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-
Question
Ar will not form a chemical bond with Cl atoms because
-
Answer
Ar already has 2 electrons in each valence orbitalThere is no force leading to your fall.
Question
When a molecule of CCl₄ is formed, electrons are
-
Answer
shared and covalent bonds are formedThere is no force leading to your fall.
Question
The theory of the electron pair and lone pairs, in the formation of the covalent bond, was first proposed by
-
Answer
LewisThere is no force leading to your fall.
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-
Question
The bond with the strongest bond dipole is
-
Answer
H - FThere is no force leading to your fall.
Question
The compound that would most likely be held together by ionic bonding is
-
Answer
CaCl₂There is no force leading to your fall.
Question
For covalent bonding between atoms, it is assumed that one or more valence electron(s)
-
Answer
sharedThere is no force leading to your fall.
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-
Question
The number of single bonds in one molecule of CH₃COOH is
-
Answer
6There is no force leading to your fall.
Question
The CORRECT statement regarding electronegativity is
-
Answer
Electronegativity is smaller for metals than nonmetals.There is no force leading to your fall.
Question
Chemical bonding in which it is assumed that electrons are transferred from one atom to another is termed
-
Answer
ionicThere is no force leading to your fall.
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-
Question
Which molecule is most polar?
-
Answer
H₂OThere is no force leading to your fall.
Question
The molecule listed below with one lone pair of electrons around its central atom is
-
Answer
NF₃There is no force leading to your fall.
Question
Which best explains why a methane (CH₄) molecule is nonpolar
-
Answer
The methane molecule is symmetricalThere is no force leading to your fall.
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-
Question
Francium is assigned the lowest electronegativity number because
-
Answer
Francium has the smallest attractive force for shared electronsThere is no force leading to your fall.
Question
A certain atom has one bonding electron, three lone pairs and twenty-eight electrons within its inner energy levels. This atom is
-
Answer
bromineThere is no force leading to your fall.
Question
Potassium chloride dissolved in pure water is an example of
-
Answer
an ionic compound dissolved in a polar solventThere is no force leading to your fall.
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Question
Ionic bonds usually form between atoms that
-
Answer
have widely different attractions for valence electronsThere is no force leading to your fall.
Question
Which statement best explains why fluorine is the most reactive nonmetal
-
Answer
Fluorine has the largest electronegativity of any of the elements on the periodic table.There is no force leading to your fall.
Question
Use the following information to answer the question Substance 1 is CH4 Substance 2 is I2 Substance 3 is H2 Substance 4 is BF3 Substance 5 is H2S Substance 6 is C2H2 The substance that possesses a multiple bond is
-
Answer
C₂H₂There is no force leading to your fall.
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-
Question
The angular (105°) molecule listed below is
-
Answer
H₂SThere is no force leading to your fall.
Question
When an H atom and a Cl atom react, a chemical bond can be expected to form because each atom tends to
-
Answer
acquire a stable octetThere is no force leading to your fall.
Question
The attraction that one atom has for another atom's electrons is called
-
Answer
electronegativityThere is no force leading to your fall.
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Question
When potassium metal, K(s), reacts with chlorine gas, Cl₂(g), a very strong chemical bond is formed because of simultaneous
-
Answer
attractions of oppositely charged ionsThere is no force leading to your fall.
Question
The electronegativity of atoms
-
Answer
generally increases in going from left to right across a periodThere is no force leading to your fall.
Question
O₃(g)
-
Answer
ozoneThere is no force leading to your fall.
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Question
H₂O(l)
-
Answer
waterThere is no force leading to your fall.
Question
NH₃(g)
-
Answer
AmmoniaThere is no force leading to your fall.
Question
CH₄(g)
-
Answer
methaneThere is no force leading to your fall.
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-
Question
C₁₂H₂₂O₁₁(s)
-
Answer
sucroseThere is no force leading to your fall.
Question
CH₃OH(l)
-
Answer
methanolThere is no force leading to your fall.
Question
C₂H₅OH(l)
-
Answer
ethanolThere is no force leading to your fall.
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Question
H₂O₂(l)
-
Answer
hydrogen peroxideThere is no force leading to your fall.
Question
H₂S(g)
-
Answer
hydrogen sulfideThere is no force leading to your fall.
Question
mono
-
Answer
1There is no force leading to your fall.
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Question
di
-
Answer
2There is no force leading to your fall.
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tri
-
Answer
3There is no force leading to your fall.
Question
tetra
-
Answer
4There is no force leading to your fall.
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Question
penta
-
Answer
5There is no force leading to your fall.
Question
hexa
-
Answer
6There is no force leading to your fall.
Question
hepta
-
Answer
7There is no force leading to your fall.
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-
Question
octa
-
Answer
8There is no force leading to your fall.
Question
nona
-
Answer
9There is no force leading to your fall.
Question
deca
-
Answer
10There is no force leading to your fall.
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-
Question
(l)
-
Answer
liquidThere is no force leading to your fall.
Question
(g)
-
Answer
gasThere is no force leading to your fall.
Question
(s)
-
Answer
solidThere is no force leading to your fall.
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Question
(ag)
-
Answer
aqueous (dissolved in water)There is no force leading to your fall.
Question
NH₄⁺
-
Answer
ammoniumThere is no force leading to your fall.
Question
CO₃²⁻
-
Answer
carbonateThere is no force leading to your fall.
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Question
HCO₃⁻
-
Answer
hydrogen carbonate or bicarbonateThere is no force leading to your fall.
Question
OH⁻
-
Answer
hydroxideThere is no force leading to your fall.
Question
NO₃⁻
-
Answer
nitrateThere is no force leading to your fall.
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-
Question
SO₄²⁻
-
Answer
sulfateThere is no force leading to your fall.
Question
thio-
-
Answer
1 less oxygen & 1 more sulfurThere is no force leading to your fall.
Question
bi-
-
Answer
1 H⁺ addedThere is no force leading to your fall.
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-
Question
E=
-
Answer
lone pairs for stereochemistryThere is no force leading to your fall.
Question
Tetrahedral (109.5°)
-
Answer
4 bonded atoms 0 lone pairs AX₄There is no force leading to your fall.
Question
Trigonal pyramid (107°)
-
Answer
3 bonded atoms 1 lone pair AX₃EThere is no force leading to your fall.
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Question
Angular (105°)
-
Answer
2 bonded atoms 2 lone pairs AX₂E₂There is no force leading to your fall.
Question
Angular (120°)
-
Answer
2 bonded atoms 1 lone pair AX₂EThere is no force leading to your fall.
Question
Trigonal Planar (120°)
-
Answer
3 bonded atoms 0 lone pairs AX₃There is no force leading to your fall.
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Question
Linear (180°)
-
Answer
2 bonded atoms 0 lone pairs AX₂There is no force leading to your fall.
Question
In the periodic table, element J, with an electron disribution of 2e⁻, 8e⁻, 2e⁻ is located in
-
Answer
period 3, group 2AThere is no force leading to your fall.
Question
An atom of an element forms a stable ion by easily losing 3 electrons. The element has an ionic charge of
-
Answer
3⁺ and is in Group 3AThere is no force leading to your fall.
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Question
The correct statement about atoms of elements in Group 8A is that they readily tend to
-
Answer
neither lose nor gain electronsThere is no force leading to your fall.
Question
An atom can be thought of as having a tiny positive nucleus surrounded by electrons of specific energy moving in orbits around the nucleus. This model of the atom is credited to
-
Answer
Neils BohrThere is no force leading to your fall.
Question
The existence of fractional atomic masses (i.e the atomic mass on the periodic table are not whole numbers) is best explained by the
-
Answer
existence of isotopesThere is no force leading to your fall.
Question
Isotopes are atoms that have different
-
Answer
atomic massesThere is no force leading to your fall.
Question
Characteristic spectral lines of an element are caused by the
-
Answer
movement of electrons to lower energy levelsThere is no force leading to your fall.
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Question
The mass number of an atom is determined by how many _____ it has in its nucleus.
-
Answer
protons and neutronsThere is no force leading to your fall.
Question
Electrons with the greatest amount of energy are found in the
-
Answer
energy level farthest from the nucleusThere is no force leading to your fall.
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Question
A subatomic particle has a 1⁻ net charge and is found outside the nucleus. It is ____
-
Answer
an electronThere is no force leading to your fall.
Question
The alkali metals generally have one electron more than the
-
Answer
noble gasesThere is no force leading to your fall.
Question
Analysis of an atom indicates that there are three electrons in the third energy level. The element is
-
Answer
AlThere is no force leading to your fall.
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Question
The energy level distribution of electrons in a flourine atom is
-
Answer
2, 7There is no force leading to your fall.
Question
An atom of an element has an electron energy level distribution of 2e⁻, 7e⁻. The symbol for the particle is
-
Answer
FThere is no force leading to your fall.
Question
The correct symbol for an ion that is most likely to form a group 2A atom is
-
Answer
W²⁺There is no force leading to your fall.
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-
Question
The ceisum ion contains
-
Answer
54 electronsThere is no force leading to your fall.
Question
The correct statement about atoms of elements in group 4A, period 3 is that they
-
Answer
do not tend to readily form ionsThere is no force leading to your fall.
Question
One subatomic particle in an atom has a greatly differing mass from other particles. This subatomic particle is
-
Answer
the electronThere is no force leading to your fall.
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Question
Element "X" readily loses 1 electron. It probably
-
Answer
belongs to the alkali metal familyThere is no force leading to your fall.
Question
The alkali metals
-
Answer
have a tendency to lose one electronThere is no force leading to your fall.
Question
The statement that BEST compares a proton and an electron is that their masses are...
-
Answer
different and charges are differentThere is no force leading to your fall.
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-
Question
A true statement about atoms is that
-
Answer
Most of the mass of an atom is centered in the nucleus.There is no force leading to your fall.
Question
How many neutrons are there in a nucleus of an atom of ¹⁸O
-
Answer
10There is no force leading to your fall.
Question
Which is the electron configuration of the sulfur atom?
-
Answer
38756There is no force leading to your fall.
Question
Which pair of atoms represents different isotopes of the same element?
-
Answer
³⁵Cl and ³⁷ClThere is no force leading to your fall.
Question
The number of valence electrons in an atom of potassium is
-
Answer
1There is no force leading to your fall.
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-
Question
When a bromine atom reacts with a sodium atom to form an ion, the bromine atom will
-
Answer
gain one electronThere is no force leading to your fall.
Question
Commonly called 'black light' this type of energy causes fluorescent objects to glow.
-
Answer
ultravioletThere is no force leading to your fall.
Question
Which type of electromagnetic radiation has the highest energy?
-
Answer
x-raysThere is no force leading to your fall.
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Question
The total number of protons in an atom is equal to its ______ number?
-
Answer
atomicThere is no force leading to your fall.
Question
Naturally occuring lithium (Li) consists of two isotopes, Li-6 (6.02 amu) and Li-7 (7.02 amu), where the isotopic masses are given in parentheses. Use the periodic table and determine which isotope is present in the larger percentage in the natural element.
-
Answer
Li-7There is no force leading to your fall.
Question
Atoms with the same atomic number and different mass numbers are called
-
Answer
isotopesThere is no force leading to your fall.
Question
The atomic mass of an element depend on?
-
Answer
depends upon the mass of each isotope of that element depends upon the relative abundance of each naturally occurring isotope of the element. depends upon the number of isotopes of that element (answer is all of the above on test)There is no force leading to your fall.
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Question
If an atom has an electron distribution of 2 - 8 - 8, then its location is in
-
Answer
period 3, group 8AThere is no force leading to your fall.
Question
Neon atoms emit characteristic spectral lines when their electrons
-
Answer
move to lower energy levelsThere is no force leading to your fall.
Question
Which electron energy structure represents an atom in the excited state?
-
Answer
36929There is no force leading to your fall.
Question
The longest wavelength for visible light is
-
Answer
redThere is no force leading to your fall.
Question
Rutherford's alpha-particle scattering experiments showed that
-
Answer
the nucleus is dense, positively charged, and contains most of the mass of the atom.There is no force leading to your fall.
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-
Question
Which electron jump represents the greatest amount of energy absorbed?
-
Answer
n=1 to n=4There is no force leading to your fall.
Question
The number of protons in O²⁻ is
-
Answer
8There is no force leading to your fall.
Question
Which statement is FALSE about spectral lines?
-
Answer
The greater the distance the electron 'jumps' , the smaller the energy of the electron.There is no force leading to your fall.
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-
Question
A magnesium ion, Mg²⁺, has
-
Answer
10 electrons and 12 protonsThere is no force leading to your fall.
Question
A particle of an element has 15 protons and 18 electrons. The correct symbol for this particle is
-
Answer
P³⁻There is no force leading to your fall.
Question
Atoms that gain electrons form negative ions.
-
Answer
TRUEThere is no force leading to your fall.
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-
Question
All matter is made up of small particles called atoms.
-
Answer
TRUEThere is no force leading to your fall.
Question
Carbon-14 is the isotope standard used for atomic mass.
-
Answer
FALSEThere is no force leading to your fall.
Question
The number of protons equals the number of electrons in any atom.
-
Answer
TRUEThere is no force leading to your fall.
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Question
Atoms are indivisible (not able to be broken down into anything smaller).
-
Answer
FALSEThere is no force leading to your fall.
Question
A bond in which atoms share a pair of electrons is called a
-
Answer
covalent bondThere is no force leading to your fall.
Question
The bonding within polyatomic ion is predominantly
-
Answer
covalentThere is no force leading to your fall.
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-
Question
A bond in which there is an unequal attraction for the shared electrons and a resultant unbalanced distribution of charge is a
-
Answer
polar covalent bondThere is no force leading to your fall.
Question
Explain how the type of bond between atoms is identified on the basis of electronegativity difference
-
Answer
Bonds with equal electronegativity numbers are non polar, while bonds with unequal electronegativities are polar. Bond with large electronegative charges are ionic.There is no force leading to your fall.
Question
A chemical symbol is
-
Answer
a representation for the name of an elementThere is no force leading to your fall.
Question
Which one of the following elements is a member of the alkali family?
-
Answer
rubidiumThere is no force leading to your fall.
Question
Which one of the following elements is a member of the alkaline earth family?
-
Answer
radiumThere is no force leading to your fall.
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Question
The boiling point of elements in group 7A on the periodic table
-
Answer
increases as the atomic number increasesThere is no force leading to your fall.
Question
Several tests were performed on an element to determine its chemical and physical properties. The following properties were identified: 1. It was found to be nonductile. 2. It was a conductor of electricity. 3.) It reacted with oxygen to form a compound that is gaseous at room temperature. The element in question is most likely
-
Answer
carbonThere is no force leading to your fall.
Question
If an element is described as being very dense, a good conductor, has a shiny surface, and is a liquid at room temperature, the description would fit which of the following elements?
-
Answer
mercuryThere is no force leading to your fall.
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Question
An unidentified element is observed to have the following properties: 1. nonlustrous 2. black in color 3. brittle 4. conductor of electricity 5. very high melting point The above element is most likely
-
Answer
cannot be determined from the listed properties.There is no force leading to your fall.
Question
Elements from different groups may have the following property (properties) in common: 1. nonlustrous 2. nonconductor of electricity 3. solid at room temperature 4. nonductile Two different elements from group 1A and group 5A would have which of these properties in common?
-
Answer
3 onlyThere is no force leading to your fall.
Question
The following question deals with the identification and characteristics of three elements, X, Y, and Z. The elements have successive atomic numbers and each increases by one in the order given. Element Y is a noble gas. Which of the following statements concerning elements X, Y, and Z is TRUE?
-
Answer
Elements X, Y, and Z could be those elements with atomic numbers 17, 18, and 19 respectivelyThere is no force leading to your fall.
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Question
The following question deals with the identification and characteristics of three elements, X, Y, and Z. The elements have successive atomic numbers and each increases by one in the order given. Element Y is a noble gas. The group of the periodic table in which you would expect to find element X is ...
-
Answer
7AThere is no force leading to your fall.
Question
The FALSE statement is
-
Answer
Mercury metal is a solid at room conditionsThere is no force leading to your fall.
Question
An element that is synthetically prepared is
-
Answer
technetiumThere is no force leading to your fall.
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Question
An element conducts electricity, is not ductile, is a solid at ordinary conditions, and is not shiny. On the basis of these properties, the best interpretation that can be made from this data is that the element
-
Answer
cannot be properly classified as a metal or a nonmetal.There is no force leading to your fall.
Question
The choices listed below are from a list made by a student during a laboratory studying the elements and their properties. Which of the following is an interpretation instead of an observation?
-
Answer
Tin is a metalThere is no force leading to your fall.
Question
Use these statements to answer the following question. 1. This element conducts an electric current. 2. This element is a liquid at room conditions. 3. This element is a metal. 4. This element is nonlustrous. 5. This element is ductile. 6. It is doubtful whether this element is a metal or a nonmetal. 7. This element is strongly attracted by a magnet. 8. This element is a solid at room conditions. 9. This element is a nonmetal. 10. This element is a gas at room conditions. 11. This element reacts with water. Statements above that are interpretations of data are
-
Answer
3, 6, and 9 onlyThere is no force leading to your fall.
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Question
Use these statements to answer the following question. 1. This element conducts an electric current. 2. This element is a liquid at room conditions. 3. This element is a metal. 4. This element is nonlustrous. 5. This element is ductile. 6. It is doubtful whether this element is a metal or a nonmetal. 7. This element is strongly attracted by a magnet. 8. This element is a solid at room conditions. 9. This element is a nonmetal. 10. This element is a gas at room conditions. 11. This element reacts with water. Statements above that are observations are
-
Answer
1, 2, 4, 5, 7, 8, 10, and 11 onlyThere is no force leading to your fall.
Question
Use these statements to answer the following question. 1. This element conducts an electric current. 2. This element is a liquid at room conditions. 3. This element is a metal. 4. This element is nonlustrous. 5. This element is ductile. 6. It is doubtful whether this element is a metal or a nonmetal. 7. This element is strongly attracted by a magnet. 8. This element is a solid at room conditions. 9. This element is a nonmetal. 10. This element is a gas at room conditions. 11. This element reacts with water. Observations that most definitely suggest the element is a metal are
-
Answer
1, 5 and 7There is no force leading to your fall.
Question
Use these statements to answer the following question. 1. This element conducts an electric current. 2. This element is a liquid at room conditions. 3. This element is a metal. 4. This element is nonlustrous. 5. This element is ductile. 6. It is doubtful whether this element is a metal or a nonmetal. 7. This element is strongly attracted by a magnet. 8. This element is a solid at room conditions. 9. This element is a nonmetal. 10. This element is a gas at room conditions. 11. This element reacts with water. Observations that most definitely suggest the element is a nonmetal are
-
Answer
8 and 10There is no force leading to your fall.
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Question
When gasoline is burned in an automobile engine,
-
Answer
potential energy is transformed into kinetic energy and heatThere is no force leading to your fall.
Question
When two or more elements unite chemically, they form a
-
Answer
compoundThere is no force leading to your fall.
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Question
Elements can be broken down by
-
Answer
nuclear changeThere is no force leading to your fall.
Question
Every sample of a given substance contains hydrogen and oxygen in a 1:8 mass ratio. This substance is classified as
-
Answer
a compoundThere is no force leading to your fall.
Question
The nonmetallic element that is a liquid at room temperature is
-
Answer
bromineThere is no force leading to your fall.
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Question
Which element is NOT a gas at room temperature?
-
Answer
germaniumThere is no force leading to your fall.
Question
Which of the following materials is a pure substance?
-
Answer
diamondThere is no force leading to your fall.
Question
Which of the following is NOT a physical change
-
Answer
the spoiling of cheeseThere is no force leading to your fall.
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Question
Which of the following is a mixture?
-
Answer
salad dressingThere is no force leading to your fall.
Question
The energy of fossil fuels like coal, oil, and natural gas is best classified as
-
Answer
potentialThere is no force leading to your fall.
Question
Which of the following observations about a patient is (are) qualitative ? A. There is too much sugar in the urine. B. The blood pressure is 140/98. C. The overall condition is normal.
-
Answer
A and CThere is no force leading to your fall.
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Question
Which of the following demonstrates that a substance is a pure element?
-
Answer
Cannot be broken down into simpler substances by chemical methodsThere is no force leading to your fall.
Question
The apple being thrown across the commons to another friend
-
Answer
kinetic energyThere is no force leading to your fall.
Question
Electricity that is being used to light a light bulb
-
Answer
kinetic energyThere is no force leading to your fall.
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Question
a car battery
-
Answer
potential energyThere is no force leading to your fall.
Question
a car sitting at the top of a hill
-
Answer
potential energyThere is no force leading to your fall.
Question
The apple you plan to eat for lunch
-
Answer
potential energyThere is no force leading to your fall.
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-
Question
Which of the following is NOT an example of matter?
-
Answer
heatThere is no force leading to your fall.
Question
All of the following are physical properties of matter EXCEPT . .
-
Answer
explosivenessThere is no force leading to your fall.
Question
Which of the following DOES NOT involve a physical change?
-
Answer
tarnishingThere is no force leading to your fall.
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Question
Which of the following is a heterogeneous mixture
-
Answer
soilThere is no force leading to your fall.
Question
Which of the following most directly affects the kinetic energy of an object?
-
Answer
its speedThere is no force leading to your fall.
Question
A heated wire glows. What type of change has likely taken place to cause this color change?
-
Answer
physicalThere is no force leading to your fall.
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Question
When energy is changed from one form to another
-
Answer
all of the energy is accounted for.There is no force leading to your fall.
Question
Xenon belongs to what group of elements?
-
Answer
noble gasesThere is no force leading to your fall.
Question
The composition of matter refers to
-
Answer
the type and number of each kind of particle in that substanceThere is no force leading to your fall.
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Question
An unidentified element is observed to have the following properties: a) a colorless gas at room temperature b) a nonconductor of electricity c) does not react with other elements The above element is most likely
-
Answer
heliumThere is no force leading to your fall.
Question
Which of the following is a true statement about compounds?
-
Answer
they are elements combined at the atomic level.There is no force leading to your fall.
Question
Universal indicator turns yellow in Sprite
-
Answer
observationThere is no force leading to your fall.
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-
Question
A chemical change is a result of a rearrangement of atoms to form new compounds
-
Answer
interpretationThere is no force leading to your fall.
Question
When potassium metal is placed in water, the flame produced is due to burning hydrogen gas with a slight amount of potassium hydroxide solution also present
-
Answer
interpretationThere is no force leading to your fall.
Question
Baking soda added to buttermilk produces bubbles
-
Answer
observationThere is no force leading to your fall.
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-
Question
A cracker turns black when iodine solution is added
-
Answer
observationThere is no force leading to your fall.
Question
When lead(II) nitrate solution reacts with sodium iodide solution, a yellow precipitate is formed
-
Answer
observationThere is no force leading to your fall.
Question
When Alka-Seltzer® is dropped into water, carbon dioxide is produced.
-
Answer
interpretationThere is no force leading to your fall.
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Question
When hydrochloric acid reacts with zinc metal hydrogen gas is formed.
-
Answer
interpretationThere is no force leading to your fall.
Question
A blue-black color produced when iodine solution is placed on crackers indicates the presence of starch.
-
Answer
interpretationThere is no force leading to your fall.
Question
When Tums® are added to water, gas bubbles are produced.
-
Answer
observationThere is no force leading to your fall.
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-
Question
Blue litmus turns red when a drop of vinegar is added.
-
Answer
observationThere is no force leading to your fall.
Question
Give an example of each type of kinetic energy. Be specific for each type. (electrical, mechanical, heat, light, sound)
-
Answer
Sound- people talking electrical- battery (when used) Mechanical- a river flowing heat- a hot day when it is sunny outside light-a light bulb when it is turned onThere is no force leading to your fall.
Question
Give an example of each type of potential energy. There are 3 types to list and give an example of.
-
Answer
Chemical-a food that has not yet been eaten Nuclear- an element waiting to be broken down in a nuclear reactor Gravitational- a car on a hillThere is no force leading to your fall.
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-
Question
In forming a chemical compound containing cobalt and iodine, the cobalt atoms transfer three electrons to the iodine atoms. The formulas of the ions involved would be
-
Answer
Co³⁺ and I⁻There is no force leading to your fall.
Question
In an ionic compound with the formula ZrO₂, the charge on each zirconium ion must be
-
Answer
4⁺There is no force leading to your fall.
Question
The type of bond that will most likely form when two atoms combine can best be predicted from each atom's
-
Answer
number of valence electronsThere is no force leading to your fall.
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-
Question
An element A combines with another element B to form a compound. If A atoms lose 3 electrons each and B atoms gain 3 electrons each, the compound has the formula
-
Answer
ABThere is no force leading to your fall.
Question
The structural units that make up samples of ionic compounds and molecular compounds respectively, can best be described as
-
Answer
ionic compounds - ions, molecular compounds - moleculesThere is no force leading to your fall.
Question
The electron rearrangment occuring when copper and oxygen combine to form the ionic compound, Cu₂O, can best be described as each copper atom
-
Answer
losing one electron and each oxygen atom gaining two electrons.There is no force leading to your fall.
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Question
The atomic number of an element is 15. Four statements about the element are: 1.) The element has 5 valence electrons. 2.) The element bonds ionically with flourine. 3.) The element shares three electrons upon entering into chemical reactions. 4.) The element forms an ion with a 5+ charge.
-
Answer
1 and 3 onlyThere is no force leading to your fall.
Question
The correct formula AND corresponding correct name of a possible ionic compound is
-
Answer
Cs₂O - cesium oxideThere is no force leading to your fall.
Question
Which of the following does NOT represent a molecular compound?
-
Answer
CoCl₂There is no force leading to your fall.
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-
Question
Methane gas, CH₄, is an example of
-
Answer
a molecular compoundThere is no force leading to your fall.
Question
Which of the following involves bonding that is predominatly covalent?
-
Answer
PH₃There is no force leading to your fall.
Question
The best description of the bond type formed between atoms from groups of elements on the periodic table is
-
Answer
covalent bond between group 6A and group 7A elementsThere is no force leading to your fall.
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-
Question
Elements of group 1A (except hydrogen) react with elements of group 6A to form
-
Answer
ionic solidsThere is no force leading to your fall.
Question
The correct formula AND corresponding correct name of a possible molecular compound is
-
Answer
OF₂ - oxygen diflourideThere is no force leading to your fall.
Question
The compound formed from atoms that share electrons to achieve a more stable structure
-
Answer
HClThere is no force leading to your fall.
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-
Question
Ionic compounds in pure form at room temperature are
-
Answer
solidsThere is no force leading to your fall.
Question
A student records the properties of a compound as 1.) solid at room temperature 2.) soluble in water 3.) solution is colorless 4.) solution is nonconducting The characteristic that conclusively classifies the sample is
-
Answer
4There is no force leading to your fall.
Question
The combination of name and compound type below that is correct is
-
Answer
carbon disulfide - molecularThere is no force leading to your fall.
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Question
A student lists the properties of a compound as: -gaseous at room temperature -soluble in water (yeilding a colorless conducting solution) The compound may
-
Answer
not be classified as either ionic or molecular using only the above dataThere is no force leading to your fall.
Question
A student wishes to select a confirmed ionic compound from an assortment of suspected ionic compounds using the least number of criteria possible. Four criteria are: - phase at room temperature -solubility in water -color of solution -conductivity of solution The least number of facts needed to confirm the compound is ionic is
-
Answer
1There is no force leading to your fall.
Question
Which of the following is the correct formula for an oxo acid?
-
Answer
CH₃COOH (aq)There is no force leading to your fall.
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-
Question
If calcium reacts with chlorine, the product will be called
-
Answer
calcium chlorideThere is no force leading to your fall.
Question
The correct formula for ammonium phosphate is
-
Answer
(NH₄)₃PO₄There is no force leading to your fall.
Question
The correct formula for ammonium dichromate is
-
Answer
(NH₄)₂Cr₂O₇There is no force leading to your fall.
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Question
Consider the compound with the formula, Al₂(C₂O₄)₃ where the species in brackets is a polyatomic ion. The correct formula of the polyatomic ion is
-
Answer
C₂O₄²⁻There is no force leading to your fall.
Question
The correct formula for copper(II) chlorate is
-
Answer
Cu(ClO₃)₂There is no force leading to your fall.
Question
Which of the following is a correct name for a molecular compound?
-
Answer
dinitrogen oxideThere is no force leading to your fall.
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-
Question
If sulfur atoms and chlorine atoms bond together covalently to from SCl₂, the correct name for this compound would be
-
Answer
sulfur dichlorideThere is no force leading to your fall.
Question
The ions combined to form a compound are NH₄⁺ and P³⁻. The correct formula for the compound would be
-
Answer
(NH₄)₃PThere is no force leading to your fall.
Question
The correct name for Pb₃(PO₄)₂ would be
-
Answer
lead(II) phosphateThere is no force leading to your fall.
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-
Question
Nickel and oxygen combine to form two different ionic compounds. The formula for the most common of these is
-
Answer
NiOThere is no force leading to your fall.
Question
The correct formula for calcium hydroxide is
-
Answer
Ca(OH)₂There is no force leading to your fall.
Question
An ionic compound always has a formula that
-
Answer
begins with the symbol for a metal or the ammonium ionThere is no force leading to your fall.
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-
Question
The metal ion below that could be named two ways is
-
Answer
Sb³⁺There is no force leading to your fall.
Question
The element that naturally exists as diatomic molecules is
-
Answer
bromineThere is no force leading to your fall.
Question
Nitrogen atoms and hydrogen atoms bond covalently to form the compound NH₃. The common name for this compound is
-
Answer
ammoniaThere is no force leading to your fall.
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-
Question
The compound given in its empirical formula form is
-
Answer
Al₂S₃There is no force leading to your fall.
Question
In the formation of the compound aluminum fluoride, the number of electrons exchanged per formula unit would be
-
Answer
3There is no force leading to your fall.
Question
Which statement completion is FALSE? Binary compounds
-
Answer
are not necessarily diatomicThere is no force leading to your fall.
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-
Question
Iron ions are chemically combined with sulfate ions, SO₄²⁻, to form a compound. The correct formula and the corresponding name respectively of the the resulting compound can be
-
Answer
Fe₂(SO₄)₃, iron(III) sulfateThere is no force leading to your fall.
Question
Which of the following is a binary ionic compound?
-
Answer
CaBr₂There is no force leading to your fall.
Question
Vinegar contains
-
Answer
CH₃COOH (aq)There is no force leading to your fall.
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-
Question
The correct formula for grain alcohol (ethanol) is
-
Answer
C₂H₅OHThere is no force leading to your fall.
Question
The formula showing the correct state of matter at room conditions is
-
Answer
O₂(g)There is no force leading to your fall.
Question
Which of the following formulas has the correct subscript for the state of matter at room conditions?
-
Answer
Na₂CO₃ (s)There is no force leading to your fall.
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-
Question
Chlorine can be used to purify water. The formula for pure chlorine at room conditions is best written as
-
Answer
Cl₂(g)There is no force leading to your fall.
Question
The formula for pure bromine at room conditions is best written as
-
Answer
Br₂ (l)There is no force leading to your fall.
Question
A gas that dissolves in water to form a conducting solution
-
Answer
conflicting properties of ionic and molecularThere is no force leading to your fall.
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-
Question
A substance that is a solid at room temperature and dissolved in water to form a conducting solution
-
Answer
ionicThere is no force leading to your fall.
Question
A gas at room temperature
-
Answer
molecularThere is no force leading to your fall.
Question
A liquid that dissolves in water to form a colorless solution
-
Answer
molecularThere is no force leading to your fall.
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-
Question
a substance that does not dissolve in water
-
Answer
molecularThere is no force leading to your fall.
Question
solid that dissolves in water to form a colorless solution
-
Answer
either ionic or molecularThere is no force leading to your fall.
Question
a liquid which gives two separate layers when added to water
-
Answer
molecularThere is no force leading to your fall.
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-
Question
a liquid at room temperature
-
Answer
molecularThere is no force leading to your fall.
Question
A solid that dissolves in water to form a nonconducting solution
-
Answer
molecularThere is no force leading to your fall.
Question
A group of atoms covalently bonded which has gained or lost one or more electrons to become electrically charged
-
Answer
polyatomic ionThere is no force leading to your fall.
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-
Question
Negative ion
-
Answer
AnionThere is no force leading to your fall.
Question
An atom which either gains or loses electrons to become electrically charged
-
Answer
Simple IonThere is no force leading to your fall.
Question
The true formula of a compound
-
Answer
Molecular formulaThere is no force leading to your fall.
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Question
Positive ion
-
Answer
CationThere is no force leading to your fall.
Question
Shows the simplest whole-number ratio of atoms
-
Answer
Empirical formulaThere is no force leading to your fall.
Question
An aqueous solution means
-
Answer
the solvent is waterThere is no force leading to your fall.
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-
Question
What is the name for this formula? NaHCO3
-
Answer
sodium hydrogen carbonateThere is no force leading to your fall.
Question
Name the following compound Al(OH)3
-
Answer
aluminum hydroxideThere is no force leading to your fall.
Question
Name the following compound NaSO4 ∙ 10 H2O
-
Answer
sodium sulfate decahydrateThere is no force leading to your fall.
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-
Question
What is the chemical formula for silver sulfide?
-
Answer
Ag₂SThere is no force leading to your fall.
Question
What is the chemical formula for vandium (V) oxide?
-
Answer
V₂O₅There is no force leading to your fall.
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-
Question
Provide the name for Fe(ClO₂)₂
-
Answer
iron (II) chloriteThere is no force leading to your fall.
Question
Eight valence electrons arranged as four pairs of electrons
-
Answer
OctetThere is no force leading to your fall.
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-
Question
A bond in which electron pairs are shared between atoms
-
Answer
Covalent bondsThere is no force leading to your fall.
Question
A diagram that shows the valence electrons of all the atoms in a molecule so arranged that the octet rule is satisfied for each atom. Electrons are always shown in pairs.
-
Answer
Lewis diagram of a moleculeThere is no force leading to your fall.
Question
An electron pair not involved in bonding
-
Answer
Lone electron pairThere is no force leading to your fall.
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-
Question
A force of attraction between chemical species (atoms, ions, molecules)
-
Answer
Chemical bondThere is no force leading to your fall.
Question
An electron pair shared by two atoms
-
Answer
Bonding electron pairThere is no force leading to your fall.
Question
A diagram of a molecule that represents atoms by the atomic symbol and electron pairs forming covalent bonds by lines
-
Answer
Structural formulaThere is no force leading to your fall.
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-
Question
The bond due to the electrostatic attraction between a positive and negative ion
-
Answer
Ionic bondThere is no force leading to your fall.
Question
A diagram that represents the valence electrons of an atom as dots around the chemical symbol of the element
-
Answer
Lewis diagram of an atomThere is no force leading to your fall.
Question
The relative attraction that an atom has for shared electrons in a covalent bond
-
Answer
ElectronegativityThere is no force leading to your fall.
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-
Question
Is odor a chemical or physical property?
-
Answer
physicalThere is no force leading to your fall.
Question
When avocado spoils and turns black , is this a chemical or physical change?
-
Answer
ChemicalThere is no force leading to your fall.
Question
Is freezing a chemical or physical change?
-
Answer
physicalThere is no force leading to your fall.
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-
Question
What is the SI unit for volume?
-
Answer
cubic meterThere is no force leading to your fall.
Question
Classify tap water as element or compound.
-
Answer
CompoundThere is no force leading to your fall.
Question
What is the SI unit for mass?
-
Answer
kilogramThere is no force leading to your fall.
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-
Question
Convert 125 C to Kelvin
-
Answer
398 KThere is no force leading to your fall.
Question
What is the volume in mL of a 5 carat diamond, given the density of diamond is 3.51g/mL? (1 carat=200mg).
-
Answer
0.2849mLThere is no force leading to your fall.
Question
A 3kg rectangular object has measurements of 21.1 gem, 14.2 cm, and 12.1 cm. What is the objects density in units of g/mL?
-
Answer
0.8274g/mLThere is no force leading to your fall.
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-
Question
A bullet is fired at 5000 ft/s. What is this in units of miles/hr?
-
Answer
3409There is no force leading to your fall.
Question
What is the density of a substance with a mass of 8.317g and a volume of 0.341 L?
-
Answer
0.024g/mLThere is no force leading to your fall.
Question
At sea level, water freezes at which temperature(s)?
-
Answer
0 CThere is no force leading to your fall.
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-
Question
A 5.0 gram sample of lead placed into 400 mL of water. What will be the new volume level of water in units of mL? The density of lead is 11.34 g/cc.
-
Answer
400.44 mLThere is no force leading to your fall.
Question
How many microliters are in 50.0 mL?
-
Answer
50000 microliterThere is no force leading to your fall.
Question
Gasoline has a density of 0.749 g/mL. How many kilograms does 30 liters of gasoline weigh?
-
Answer
22.47There is no force leading to your fall.
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-
Question
Electrons have an electrical charge of +1
-
Answer
FALSEThere is no force leading to your fall.
Question
Which of the following is a characteristic of the modern periodic table?
-
Answer
The elements in each group have similar chemical properties.There is no force leading to your fall.
Question
To form an ion, a sodium atom.
-
Answer
loses one electronThere is no force leading to your fall.
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-
Question
Noble gases are in Group 8A(18).
-
Answer
TRUEThere is no force leading to your fall.
Question
Calcium is a ___ block element
-
Answer
SThere is no force leading to your fall.
Question
Magnesium is an element that is one example of ________.
-
Answer
a representative elementThere is no force leading to your fall.
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-
Question
Iodine is a metal
-
Answer
FALSEThere is no force leading to your fall.
Question
Chromium forms more than one positive ion
-
Answer
TRUEThere is no force leading to your fall.
Question
Classify the following elements (match) Sodium Argon Bromine Copper Magnesium
-
Answer
Alkali metal Noble gas halogen transition element alkaline earth metalThere is no force leading to your fall.
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Question
Isotopes are atoms of the same element that have
-
Answer
the same atomic number, but different number of neutronsThere is no force leading to your fall.
Question
Isotopes have the same mass number, but different number of protons.
-
Answer
FALSEThere is no force leading to your fall.
Question
Ca is the symbol for
-
Answer
calciumThere is no force leading to your fall.
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-
Question
Do the following represent in a. group, period, or neither? F,S,P
-
Answer
neitherThere is no force leading to your fall.
Question
A neutron has an electrical charge of ________.
-
Answer
0There is no force leading to your fall.
Question
Is Nickel a nonmetal?
-
Answer
NoThere is no force leading to your fall.
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-
Question
A group off covalently bonded atoms that has an overall electrical charge is called a
-
Answer
polyatomic ionThere is no force leading to your fall.
Question
The elements lithium, sodium, and potassium
-
Answer
are the same groupThere is no force leading to your fall.
Question
The element in this list with chemical properties similar to magnesium
-
Answer
strontiumThere is no force leading to your fall.
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-
Question
Which of the following elements is a noble gas?
-
Answer
argonThere is no force leading to your fall.
Question
The ion of aluminum is
-
Answer
Al3+There is no force leading to your fall.
Question
Which of the following is a characteristic of nonmetals?
-
Answer
low melting pointsThere is no force leading to your fall.
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-
Question
Is Chlorine a Non-metal?
-
Answer
YesThere is no force leading to your fall.
Question
Which of the following elements is a metal?
-
Answer
strontiumThere is no force leading to your fall.
Question
Is Cobalt a metal?
-
Answer
YesThere is no force leading to your fall.
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-
Question
An anion always
-
Answer
has a negative chargeThere is no force leading to your fall.
Question
What is the formula for potassium nitrate
-
Answer
KNO3There is no force leading to your fall.
Question
what is the name of AgCi?
-
Answer
silver chlorideThere is no force leading to your fall.
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-
Question
From the following linear alkanes, which one has the greatest number of carbon atoms?
-
Answer
OctaneThere is no force leading to your fall.
Question
How many atoms of carbon are in 1.2 moles of CO2?
-
Answer
7.23 E23 atomsThere is no force leading to your fall.
Question
What is the formula of sulfur dioxide?
-
Answer
SO2There is no force leading to your fall.
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-
Question
What is the formula for pentane?
-
Answer
C5H12There is no force leading to your fall.
Question
What is the formula for baking soda?
-
Answer
NaHCO3There is no force leading to your fall.
Question
What is the formula for iron(III) chloride hexahydrate?
-
Answer
FeCI3*6H2OThere is no force leading to your fall.
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-
Question
What is the formula of iron (III) oxide?
-
Answer
Fe2O3There is no force leading to your fall.
Question
What is the formula for lithium hypochlorite?
-
Answer
LiCIOThere is no force leading to your fall.
Question
What is the molar mass of acetic acid, in g/mol?
-
Answer
60 g/molThere is no force leading to your fall.
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-
Question
Is FeCI2 an ionic compound?
-
Answer
yesThere is no force leading to your fall.
Question
What is the mass percent of fluorine in carbon tetrafluoride?
-
Answer
0.8635There is no force leading to your fall.
Question
What is the formula of sulfurous acid?
-
Answer
H2SO3There is no force leading to your fall.
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-
Question
What is the formula for sodium iodide?
-
Answer
NaIThere is no force leading to your fall.
Question
A compound contains one copper atom and two bromine atoms. What is its chemical formula? CoBr2
-
Answer
CuBr2There is no force leading to your fall.
Question
Is LisO4 a Molecular Compound?
-
Answer
notThere is no force leading to your fall.
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-
Question
What is the name of NH4CI?
-
Answer
Ammonium chlorideThere is no force leading to your fall.
Question
Is CaBr2 an ionic compound?
-
Answer
yesThere is no force leading to your fall.
Question
What is the molar mass of sodium bicarbonate, in g/mol?
-
Answer
84g/molThere is no force leading to your fall.
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-
Question
Determine the solution of volume in mL needed to make a 1M aqueous solution when 10.25 grams of NaOH (molar mass=40g/mole) is dissolved in water.
-
Answer
250mLThere is no force leading to your fall.
Question
Balance the following chemical reaction and determine the number of moles HI produced when 2 moles of H2(g) are consumed in the following chemical reaction: _H2(g)+_____(2)(g)-->_____HI(g)
-
Answer
1,1,2There is no force leading to your fall.
Question
How would you classify the following chemical reaction? 2HNO3(aq)+Ca(OH)2(aq)-->Ca(NO3)2(aq)+2H2O(I)
-
Answer
Acid base neutralizationThere is no force leading to your fall.
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-
Question
What is the oxidation state of the sulfur in SO2?
-
Answer
4There is no force leading to your fall.
Question
In the following chemical reaction , Al(s) is___ 2Al(s)+3Pt(NO3)2(aq)-->3Pt(s)+2Al(NO3)3(aq)
-
Answer
the reducing agentThere is no force leading to your fall.
Question
Which of the following compounds is insoluble in water?
-
Answer
All of the aboveThere is no force leading to your fall.
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-
Question
What is the mass in grams of Na2CO2(s) (molar mass=105.98g/mole) that, when dissolved in 100 mL of water, will make a 1M aqueous solution?
-
Answer
10.59There is no force leading to your fall.
Question
What is the molarity of a solution prepared by dissolving 20 grams of NaOH(molar mass=40g/mole in water to make a 100 mL solution?
-
Answer
5There is no force leading to your fall.
Question
When Fe(NO3)2(aq) and Na2S(aq) are mixed, what is the black colored predicate that forms:
-
Answer
FeSThere is no force leading to your fall.
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-
Question
Consider the following chemical reaction between methane (CH4) and oxygen (O2) to form carbon dioxide (CO2)and water (H2O): CH4+2O2-->CO2+2H2O. What do the coefficients mean?
-
Answer
1 mole of methane rats with 2 moles of oxygen to produce 1 mole of carbon dioxide and 2 moles of waterThere is no force leading to your fall.
Question
Balance the following chemical equation and determine the number of moles of Fe(s) produced when 1 moles of Fe2O3(s) react with excess C(s)to produce Fe(s) and CO2 (g). ___Fe2O3(s)+___C(s)--->___ Fe(s)+CO2 (g)
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Answer
2.00 moleThere is no force leading to your fall.
Question
What is the oxidation state of the phosphorus atom in P3O6?
-
Answer
6There is no force leading to your fall.
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-
Question
What is the oxidation number of the calcium atom in Ca(OH)2?
-
Answer
2There is no force leading to your fall.
Question
Which of the following coefficient numbers correspond to the balanced reaction: _CH6H12(I)+__O2(g)->__CO2(g)+__H2O(I)
-
Answer
1,9,6,6There is no force leading to your fall.
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-
Question
A gas expands from 200mL TO 600mL at constant temperature. How much work is done by the gas (joules) if it expands against a constant pressure of 6.00 atm?
-
Answer
-243.12jThere is no force leading to your fall.
Question
A balloon is inflated with air from an initial volume of 1L to 2L against an external pressure of 1.01 atm. If the inflation occurred under adiabatic conditions, then what is the change in internal energy of the air?
-
Answer
102.313There is no force leading to your fall.
Question
10.0 grams of water are heated during the preparation of a cup of coffee 1.0*10^3 J of heat are added to the water, which is initially at 20.0 C. What is the final temperature of the coffee?
-
Answer
43.9There is no force leading to your fall.
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-
Question
When 1g of magnesium (M.W=24.31g/mol) is burned in a bomb calorimeter that has a heat capacity of 3.03 kJ/C, the temperature increases by 1.5C. How much heat (kJ/mol) is liberated during the burning of the magnesium?
-
Answer
-110.48kJ/mol MgThere is no force leading to your fall.
Question
The following statement regarding the 1st law of thermodynamics is true or false? "Internal energy of an isolated system is constant"
-
Answer
TRUEThere is no force leading to your fall.
Question
When 1.0g of Zn (M.W.=65.38g/mol) combines with enough HCI to make 60 mL of HCI (aq) in a coffee cup of calorimeter, all of the zinc reacts which increases the temperature of the HCI solution from 23.0C to 24.5 C. Calculate the enthalpy change of the reaction ^Hrxn.(Assume the density of the solution is 1.00 g/mL and the specific heat capacity of solution is 4.184 J/g C.)
-
Answer
25104 jThere is no force leading to your fall.
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-
Question
The following statement regarding Conservation of energy is true or false? "Energy is neither created nor destroyed, rather it is converted between forms"
-
Answer
TRUEThere is no force leading to your fall.
Question
A material with a smaller specific heat capacity will experience a greater temperature change than a material with a greater specific heat capacity per unit of heat.
-
Answer
TRUEThere is no force leading to your fall.
Question
You kick a ball weighing 5 kg into the air with a velocity of 20 m/s. What is the kinetic energy involved in this task?
-
Answer
1000 Kg m2/s2There is no force leading to your fall.
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-
Question
Can work done against a vacuum?
-
Answer
NotThere is no force leading to your fall.
Question
Convert 10000 j to kcal
-
Answer
2.39There is no force leading to your fall.
Question
A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 65.0 C. Determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/g C.
-
Answer
1.74 kgThere is no force leading to your fall.
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-
Question
Convert 1000J to Wh
-
Answer
0.27WhThere is no force leading to your fall.
Question
How much heat is liberated (in kJ) from 100 g of silver (c=0.235 Jg^-1C^-1) when it cools from 100 C to 20 C?
-
Answer
1800kJThere is no force leading to your fall.
Question
Which statement(s) about state functions is correct?
-
Answer
State functions are path independentThere is no force leading to your fall.
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-
Question
10.0 grams of water are heated during the preparation of a cup of coffee 1.0*10^3J of heat are added to the water, which is initially 20 temperature of the coffee?
-
Answer
43.9There is no force leading to your fall.
Question
An adiabatic process occurs with transfer of heat and matter.
-
Answer
FALSEThere is no force leading to your fall.
Question
A balloon is inflated with air from an initial volume of 1 L to 2 L against an external pressure of 1.01 atm. If the inflation occurred under adiabatic conditions, then what is the change in internal energy of the air?
-
Answer
102.313JThere is no force leading to your fall.
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-
Question
A sample of sand (c=.750J g-1 C-1) initially at 20 C absorbs 2*10^3 J of heat. The final temperature of the sand is 80 C. What is the mass (in g) of sand in the sample?
-
Answer
44.44gThere is no force leading to your fall.
Question
The principal quantum number n quantizes the following
-
Answer
the energy of an electron in the hydrogen atomThere is no force leading to your fall.
Question
What is the reaction between alkali metals and water?
-
Answer
ViolentThere is no force leading to your fall.
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-
Question
All ionizations are by definition, endothermic
-
Answer
TRUEThere is no force leading to your fall.
Question
What does Paramagnetic term mean?
-
Answer
a substance that is attracted to a magnetic fieldThere is no force leading to your fall.
Question
How are metallic characters is defined?
-
Answer
Tendency to readily lose an electron.There is no force leading to your fall.
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-
Question
The magnetic quantum number determines the following:
-
Answer
The orientation of a particular orbitalThere is no force leading to your fall.
Question
What does diamagnetic term mean?
-
Answer
A substance that is not attracted to a magnetic fieldThere is no force leading to your fall.
Question
What are valence electrons?
-
Answer
Those that participate in chemical bondingThere is no force leading to your fall.
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-
Question
Each different value of l (angular moment) produces a subshell
-
Answer
TRUEThere is no force leading to your fall.
Question
When filling orbitals with electrons, the lowest energy orbitals are filled first before moving on to higher energy orbitals
-
Answer
TRUEThere is no force leading to your fall.
Question
What is Aufbau principle used for?
-
Answer
To star populating orbitals with electronsThere is no force leading to your fall.
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-
Question
In the periodic table the metallic character is increased from right to left
-
Answer
TRUEThere is no force leading to your fall.
Question
What happens when the number of protons in the nucleus increases
-
Answer
The atom size decrease.There is no force leading to your fall.
Question
What does isoelectric term means?
-
Answer
They have different electron configurationThere is no force leading to your fall.
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-
Question
Which element has the highest ionization energy?
-
Answer
ArgonThere is no force leading to your fall.
Question
An amphoteric substance can behave at either an acid or a base.
-
Answer
TrueWThere is no force leading to your fall.
Question
What is stated by Paul Exculsion Principle?
-
Answer
A & B are correct.There is no force leading to your fall.
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-
Question
Which element has the most metallic character?
-
Answer
PotassiumThere is no force leading to your fall.
Question
For a multi-electron atom, which orbital is higher in energy?
-
Answer
2p orbitalThere is no force leading to your fall.
Question
the quantum number (l) that quantizes the following:
-
Answer
Angular momentumThere is no force leading to your fall.
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-
Question
Answer the following questions about the diamine molecule N2H2 molecule. There are [A] double bonds in this molecule.
-
Answer
1There is no force leading to your fall.
Question
Shown in the accompanying image is a general Lewis dot formula for a family of representative elements where is the general notation. for the elemental symbols of this elemental family * There is an X WITH 8 DOTS) The chemical symbol of the third member of this family is [A]
-
Answer
ArThere is no force leading to your fall.
Question
Answer the following questions about the diamine molecule N2H3 molecule. There are [A] single bonds in this molecule.
-
Answer
2There is no force leading to your fall.
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-
Question
Answer the following questions about the diazine molecule, N2H2 molecule. There are [A] triple bonds in this molecule.
-
Answer
There is no force leading to your fall.
Question
Answer the following questions about the nitrous chloride NOCI, molecule. The central atom(s) are [A] name of element (s)/
-
Answer
OxygenThere is no force leading to your fall.
Question
If the pressure of a sample of gas is double while h9lding the temperature of the gas constant, then the volume of the gas is
-
Answer
There is no force leading to your fall.
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-
Question
If a 300.0 mL sample of gas is heated at constant pressure from 50.0 C to 55.0 C, its new volume is __ mL?
-
Answer
304mLThere is no force leading to your fall.
Question
According to Boyle's Law, what happened when the p[pressure of the gas is increased?
-
Answer
Volume decreasesThere is no force leading to your fall.
Question
A helium filled balloon is launched when the temperature at ground level is 27.8 C and the barometer reads 752mmHg. If the balloons volume at launch is 9 L. What is the volume in Liters at a height of 36km, where the pressure is 73.0 mm Hg and temperature is 235.0 K?
-
Answer
72.38There is no force leading to your fall.
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-
Question
Calculate the kinetic energy in J/mol, of 1.00 of gaseous water molecules at room temperature (25 C) R=8.314J/molK
-
Answer
3718 J/molThere is no force leading to your fall.
Question
The Ideal Gas Law is best applied at low temperature and high pressure.
-
Answer
FALSEThere is no force leading to your fall.
Question
How many moles of O2 molecules are present in a 1L sample of dry air at 2atm and 25 C? ( Oxygen constitutes 20.94% of the molecules in dry air .) (R=0.0821 L atm/mol K)
-
Answer
0.017 moles of O2 moleculesThere is no force leading to your fall.
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-
Question
Choose the statement that describe gas properties
-
Answer
They are compressible to the extent that if the pressure is doubled; the volume decreases by half.There is no force leading to your fall.
Question
Calculate the root mean square velocity in m/s of carbon dioxide molecules at 100.0 C.
-
Answer
459There is no force leading to your fall.
Question
What happened when a solid is heated sufficiently turning the solid into a liquid?
-
Answer
Given the molecules sufficient kinetic energy to overcome their intermolecular forcesThere is no force leading to your fall.
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-
Question
Covalent bonds form between
-
Answer
two nonmetalsThere is no force leading to your fall.
Question
Are intermolecular weaker or stronger than bonding forces?
-
Answer
weakerThere is no force leading to your fall.
Question
The more polar molecule or highly charged the ion, the stronger the attraction from one species to another
-
Answer
TRUEThere is no force leading to your fall.
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-
Question
Use the following information on Na to determine the total amount of heat required to convert 150.0 g of solid Na at 48.0 C into gaseous Na at 883 C. Melting point= 98C Boiling Point=883C Molar Heat Capacities: CSolid=23.7 J/mol C liquid=37.5 J/mol C ^Hfusion=2.64kJ/mol ^H vaporization= 97.9 kJ/mol
-
Answer
855kJThere is no force leading to your fall.
Question
Identify the substances that has/have the highest boiling point
-
Answer
Methyl amineThere is no force leading to your fall.
Question
Intermolecular forces are essential in determining the energies involved in phase changes, such as
-
Answer
All of the aboveThere is no force leading to your fall.
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-
Question
We can typically ignore the intermolecular forces of attraction in gasses due to their large kinetic energies and intermolecular distances
-
Answer
TRUEThere is no force leading to your fall.
Question
Var der Waals Forces are also known as intermolecular forces
-
Answer
TRUEThere is no force leading to your fall.
Question
Intermolecular force strength decreases or increases with larger distance between the species?
-
Answer
DecreasesThere is no force leading to your fall.
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-
Question
Intermolecular forces have their greatest effect on the physical properties of substances or in the chemical properties of substances?
-
Answer
Physical PropertiesThere is no force leading to your fall.
Question
Polar molecules have partial negative and positive charges
-
Answer
TRUEThere is no force leading to your fall.
Question
What happened when the temperature is increase in a system?
-
Answer
Intermolecular distances increaseThere is no force leading to your fall.
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-
Question
Which state of matter has lower density?
-
Answer
GasThere is no force leading to your fall.
Question
Determine the amount of heat required to convert 500.0 g of liquid ethanol at 25 into gaseous ethanol at 125 C. Use the following information on ethanol (C22H55OH) to calculate the amount of heat for each steps. Melting points =-117 C Boiling g Point=78.3 C Molar Heat Capacities:Csolid=113J/mol C Liquid=420 J/mol C^Hfusion=5.02kJ/mol H^vaporization=39.3 kJ/mol
-
Answer
707.7There is no force leading to your fall.
Question
100 moles of ethylene glycol is added to 300 moles of wteer to room temperature. The vapor pressure of water at room temperature is 25 Torr. Calculate the vapor pressure of the resulting solution.
-
Answer
18.75There is no force leading to your fall.
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-
Question
How many moles of water does a bottle of/ 1L Hydrogen peroxide solution of 20.00% contains (Water density)
-
Answer
44.4There is no force leading to your fall.
Question
Collgative properties depend only on the amount of solute present
-
Answer
TRUEThere is no force leading to your fall.
Question
How many grams of sodium hydroxide (MW=40g/mol) are needed to prepare 4 liters of a 0.500M solution?
-
Answer
80.0gThere is no force leading to your fall.
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-
Question
1000ppm is equal to 1000mg/kg
-
Answer
TRUEThere is no force leading to your fall.
Question
20.0mL from an 10.0 M solution of concentration nitric acid is diluted until the total volume of the resulting solution is 2.50L. What is the concentration of the dilute solution?
-
Answer
0.08There is no force leading to your fall.
Question
Which of the following non-electrolyte solutions has the greatest freezing point?
-
Answer
1.5 moles of ethanol (aq)There is no force leading to your fall.
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-
Question
What do you expect to happen to the solubility of any solute as temperature is increased in any reaction ?
-
Answer
The solubility of solute will increaseThere is no force leading to your fall.
Question
What is the molarity of a solution that has been prepared by mixing 100.0g of sodium chloride (M.F=58.5g/mol) with 500g of water ?
-
Answer
3.41There is no force leading to your fall.
Question
Determine the normality of bromide ion when 0.745g of calcium bromide is dissolved in water and diluted to a final volume of 250mL
-
Answer
0.0298NThere is no force leading to your fall.
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-
Question
What is/are characteristic/s of an ideal solution?
-
Answer
There is no heat exchanged when mixedThere is no force leading to your fall.
Question
What is the mass percent of ethanol (CH3CH2OH) if 1 moles of ethanol is added to 1kg of water?
-
Answer
0.0439There is no force leading to your fall.
Question
Entrophy is highest in a solid than in a gas
-
Answer
FALSEThere is no force leading to your fall.
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-
Question
Calculate the concentration of oxygen in water at 25 C, given a partial pressure of oxygen above water of 0.5 atm.(KH=1.3e-3mol/atm)
-
Answer
6.5*10-4MThere is no force leading to your fall.
Question
What is the molarity of a solution that is prepared dissolving 10g NaOH (M.F=40g/mol) in 1L of water ?
-
Answer
0.25There is no force leading to your fall.
Question
Solve: x-12≥8
-
Answer
x≥20There is no force leading to your fall.
Question
Solve: 5<2 (Multiply only by positive number)
-
Answer
15>6There is no force leading to your fall.
Question
Solve: -3<7
-
Answer
TRUEThere is no force leading to your fall.
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-
Question
Solve: x/4 >5 (Multiply by reciprocal)
-
Answer
x>20There is no force leading to your fall.
Question
Solve: 3(4x+6)≤42+6(2x-4)
-
Answer
All real numbersThere is no force leading to your fall.
Question
Solve: 9x-5(x-5) ≤4 (x-3)
-
Answer
No solutionThere is no force leading to your fall.
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-
Question
Define: And
-
Answer
both situations must be true; is a squished equationThere is no force leading to your fall.
Question
Define: Or
-
Answer
one or the other or both must be true; never squishedThere is no force leading to your fall.
Question
Solve: x-3≥-11 and x+8≤ 3
-
Answer
x ≥ 8 and x≤-53There is no force leading to your fall.
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-
Question
Solve: -2≤x-3< 4
-
Answer
x≥1 and x< 7There is no force leading to your fall.
Question
Solve: 3x-7≤5 and 2x+6 ≤12
-
Answer
x≥4 and x≤3 No solutionThere is no force leading to your fall.
Question
Solve: -1+x≤5 or -x≤-4
-
Answer
x≤6 or x ≥4 all real numbersThere is no force leading to your fall.
Question
Define: |x|>3
-
Answer
the distance from 0 is greater than 3There is no force leading to your fall.
Question
Define: |x|<3
-
Answer
the distance from 0 is less than 3There is no force leading to your fall.
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-
Question
Define: Less than means ____
-
Answer
AndThere is no force leading to your fall.
Question
Solve: Greater means ____
-
Answer
OrThere is no force leading to your fall.
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-
Question
Write |3x + 6| ≥ 12 in its two equations and solve
-
Answer
3x + 6 ≥ 12 or 3x + 6 ≤ -12; x≥2 or x≤-6There is no force leading to your fall.
Question
Solve: |3x+5|+10≤5
-
Answer
No solutionThere is no force leading to your fall.
Question
Solve: |2x-7|≥-3
-
Answer
All real numbersThere is no force leading to your fall.
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-
Question
≥or ≤ means
-
Answer
solid lineThere is no force leading to your fall.
Question
Parallel lines have how many solutions?
-
Answer
NoneThere is no force leading to your fall.
Question
Intersecting lines have how many solutions?
-
Answer
OneThere is no force leading to your fall.
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-
Question
Overlapping lines have how many solutions?
-
Answer
InfiniteThere is no force leading to your fall.
Question
Solve by substitution: {y=3x {x+2y=-21
-
Answer
(-3,-9)There is no force leading to your fall.
Question
Define: In order to have infinite solutions or have no solution all the variables must___
-
Answer
disappearThere is no force leading to your fall.
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-
Question
Solve using substitution: {6x-2y=-4 {y=3x+2
-
Answer
-4=-4; infinite solutionsThere is no force leading to your fall.
Question
Solve using substitution: {2x+2y=8 {x=-y-2
-
Answer
-4=8; no solutionThere is no force leading to your fall.
Question
Solve using elimination: {2x + 5y = 31 {3x - 5y = -16
-
Answer
(3,5)There is no force leading to your fall.
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-
Question
What do you do if the coefficients are not the same nor opposites?
-
Answer
You multiply them by a number to make them the same or oppositesThere is no force leading to your fall.
Question
Solve using elimination: {-3x + 2y = 3 {6x - 4y = 15
-
Answer
No solutionThere is no force leading to your fall.
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-
Question
Solve using elimination: { 3x + 3y = 6 { x + y = 2
-
Answer
Infinite solutionsThere is no force leading to your fall.
Question
Solve: The sum of two numbers is 18 and difference; is 12.Find each of the numbers. (find the variables in the problem then solve using substitution or elimination)
-
Answer
one number is 15 and the other is 13There is no force leading to your fall.
Question
Solve: Bob is seven times more than three times his son, Will. Nine years ago Bob was one more than 11 times as old as Will. How old are they now? ( make an equation to find Bob's age then solve)
-
Answer
Will is 12 and Bob is 43There is no force leading to your fall.
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-
Question
Solve: Homeroom was collecting coins for SHOUT week. The rep has collected 57 coins for a total of
-
Answer
8.45. Interestingly, they have only collected nickels and quarters. How many of each do they have? (make a chart then solve)There is no force leading to your fall.
Question
Solve: Patricia flew a plane for 3 hours with the wind and traveled 585 km. The return trip against the wind took 5 hours. Find the rate of the plane and the rate of the wind. (make a chart and solve)
-
Answer
156mph for the plane's speed and 39mph for the wind's speedThere is no force leading to your fall.
Question
Define: A two digit number is represented by ____
-
Answer
10t+uThere is no force leading to your fall.
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-
Question
Solve: A certain two-digit number has a value that is 1 more than 5 times the sum of its digits. The units digit is one more than the tens digit. Find the number.
-
Answer
56There is no force leading to your fall.
Question
Solve: The value of a certain two-digit number is five times the sum of its digits. If the digits are reversed, the resulting is 9 more than the original number. Find the original number.
-
Answer
45There is no force leading to your fall.
Question
Define: When you are graphing an inequality the solution is ___.
-
Answer
The area is the area is that overlapsThere is no force leading to your fall.
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-
Question
Define: If there is no overlap on the graph the answer is ___.
-
Answer
no solutionThere is no force leading to your fall.
Question
Define: Monomial
-
Answer
One term - a constant, or a variable, or a product of constant and/or variable(s)There is no force leading to your fall.
Question
Define: When multiplying terms of identical bases, you ___ the exponents
-
Answer
addThere is no force leading to your fall.
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-
Question
Solve: (x²) (x³)
-
Answer
x⁵There is no force leading to your fall.
Question
Define: When raising a power to yet another power, you ___ the exponents
-
Answer
multiplyThere is no force leading to your fall.
Question
Solve: (2x³y)³ (4xy²)(-5xy³z²)
-
Answer
-160x¹¹y⁸z²There is no force leading to your fall.
Question
Reduce: 18/24
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Answer
44259There is no force leading to your fall.
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Question
Solve: x⁵/x³
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Answer
x²There is no force leading to your fall.
Question
Define: When dividing monomials with the same base, you ___ exponents (top to bottom)
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Answer
subtractThere is no force leading to your fall.
Question
Solve: 1/x⁻³
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Answer
x³There is no force leading to your fall.
Question
Solve: 3x³y²z⁸/21x⁵yz⁴
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Answer
yz⁴/7x²There is no force leading to your fall.
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Question
Solve: x⁰
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Answer
1There is no force leading to your fall.
Question
Define: polynomial
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Answer
a monomial or a sum of monomialsThere is no force leading to your fall.
Question
Define: To add or subtract terms and combine them, they must be ___terms.
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Answer
likeThere is no force leading to your fall.
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Question
Define: Binomial
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Answer
two termsThere is no force leading to your fall.
Question
Define: trinomial
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Answer
three termsThere is no force leading to your fall.
Question
Define: The degree of any particular monomial is the sum of all the variables' _____
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Answer
exponentsThere is no force leading to your fall.
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Question
Define: The degree of any polynomial is the degree of the term with the ____ degree
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Answer
highestThere is no force leading to your fall.
Question
Define: Linear
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Answer
1st degreeThere is no force leading to your fall.
Question
Define: Quadratic
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Answer
2nd degreeThere is no force leading to your fall.
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Question
Define: Cubic
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Answer
3rd degreeThere is no force leading to your fall.
Question
Solve: (3x² - 4x + 8) + (2x - 7x² - 5) What is the degree and number of terms
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Answer
-4x²-2x-13; Quadratic trinomialThere is no force leading to your fall.
Question
Solve: (2x² - 3x + 5) - (2x² - 8x - 2)
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Answer
5x+7; Linear binomialThere is no force leading to your fall.
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Question
When multiplying polynomials you use the ____ property
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Answer
DistributiveThere is no force leading to your fall.
Question
Solve: -2x³(7x² - 7x + 10)
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Answer
-14x⁵+14x⁴-20x³There is no force leading to your fall.
Question
Solve: 2(x² + 5) + x(x² - 2x)
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Answer
x³+10There is no force leading to your fall.
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Question
Solve:x(x -12) + x(x + 2) + 25 = 2x(x +5) - 15
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Answer
x=12There is no force leading to your fall.
Question
Picture has dimensions of: Length: 4x - 6 Width: x Outside of the frame has dimensions: Length: 5x Width: 2x + 1
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Answer
6x²+11xThere is no force leading to your fall.
Question
Solve by foiling: (x + 3)(x + 2)
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Answer
x²+5x+6There is no force leading to your fall.
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Question
Solve: (x + 8)(x - 4)
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Answer
x²+4x-32There is no force leading to your fall.
Question
The pattern for a square of a sum is what?
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Answer
(a+b)²=a²+2ab+b²There is no force leading to your fall.
Question
In the absence of an external force, a moving object will
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Answer
Move with constant velocityThere is no force leading to your fall.
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Question
Two cars collide head-on. At every moment during the collision, the magnitude of the force the first car exerts on the second is exactly equal to the magnitude of the force the second car exerts on the first. This is an example of
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Answer
Newton's third lawThere is no force leading to your fall.
Question
Mass and weight
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Answer
Are two different quantitiesThere is no force leading to your fall.
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Question
An object of mass m is hanging by a string from the ceiling of an elevator. The elevator is moving up at constant speed. What is the tension in the string?
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Answer
Exactly mgThere is no force leading to your fall.
Question
Which of the following statements is NOT true? I. a = ΣF/m II. Ff = μkFn III Ff > μsFn
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Answer
III onlyThere is no force leading to your fall.
Question
It's more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity because
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Answer
μk < μsThere is no force leading to your fall.
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Question
A block of mass M slides down a frictionless plane inclined at an angle θ with the horizontal. The gravitational force is directed
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Answer
Toward the center of the earthThere is no force leading to your fall.
Question
Two toy cars (16 kg and 2.0 kg) are released simultaneously on an inclined plane that makes an angle of 30° with the horizontal. Make a statement which best describes their acceleration after being released.
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Answer
Both cars accelerate at the same rateThere is no force leading to your fall.
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Question
A sports car of mass 1000 kg can accelerate from rest to 27 m/s in 7 s. What is the average forward force on the car?
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Answer
3.9 x 10^3 NThere is no force leading to your fall.
Question
An antitank weapon fires a 3.00-kg rocket which acquires a speed of 50 m/s after traveling 90.0 cm down a launching tube. Assuming the rocket was accelerated uniformly, what is the average force acted on it?
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Answer
4.17 x 10^3 NThere is no force leading to your fall.
Question
A stack of books rests on a level frictionless surface. A force F acts on the stack, and it accelerates at 3.0 m/s^2. A 1.0 kg book is then added to the stack. The same force is applied, and now the stack accelerates at 2.0 m/s^2. What was the mass of the original stack?
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Answer
2.0 kgThere is no force leading to your fall.
Question
A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37° above the horizontal. If the mass of the box and the books is 40.0 kg, what is the acceleration of the box?
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Answer
2.0 m/s^2There is no force leading to your fall.
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Question
A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37° above the horizontal. If the mass of the box and the books is 40.0 kg, what is the normal force on the box?
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Answer
332 NThere is no force leading to your fall.
Question
An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -s.45 m/s^2. What is the coefficient kinetic friction between the object and the floor?
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Answer
0.25There is no force leading to your fall.
Question
Four students measure the mass of an object, each using a different scale. They record their results as follows: Student A B C D Mass (g) 27.2 27.21 30 27 Which student used the least precise scale?
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Answer
CThere is no force leading to your fall.
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Question
All of the following are base units of the SI system EXCEPT: a. Kilogram b. Kelvin c. Meter d. Volt e. Candela
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Answer
VoltThere is no force leading to your fall.
Question
How many basic units does the SI system have?
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Answer
SevenThere is no force leading to your fall.
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