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uestion 1
2.5 out of 2.5 points
The isopropyl group is (CH3)2CH−.

Selected Answer:
True
Correct Answer:
True
Question 2
0 out of 2.5 points
How many moles of carbon dioxide are formed in the complete combustion of one mole of octane, C8H18?
Selected Answer:
16
Correct Answer:
8
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Question 3
2.5 out of 2.5 points
The heavier the solute molecule is, the greater the effect on the freezing point of a
solution.

Selected Answer:
False
Correct Answer:
False
Question 4
0 out of 2.5 points
Benzene molecules can exist in chair and boat conformations.
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Selected Answer:
True
Correct Answer:
False
Question 5
2.5 out of 2.5 points
Changing the temperature alters the value of the equilibrium constant for a reaction.

Selected Answer:
True
Correct Answer:
True
Question 6
2.5 out of 2.5 points
Which statement correctly describes what happens in the reaction shown below?
2Mg(s) + S2(g) → MgS(s)
Selected Answer:
Mg is oxidized.
Correct Answer:
Mg is oxidized.
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Question 7
2.5 out of 2.5 points
The combination of a weak acid and a strong acid in water form a buffer solution.
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Selected Answer:
False
Correct Answer:
False
Question 8
2.5 out of 2.5 points
Aromatic compounds undergo substitution reactions more readily than addition reactions.

Selected Answer:
True
Correct Answer:
True
Question 9
2.5 out of 2.5 points
Dehydration of the alcohol shown below produces styrene, an important starting material
in the polymer and plastics industry. What is the structure of styrene?
Selected Answer:
Correct Answer:
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Question 10
0 out of 2.5 points
The concentration of a weak acid or base does not affect the degree of dissociation.

Selected Answer:
True
Correct Answer:
False
Question 11
2.5 out of 2.5 points
Which of the following is FALSE about the energy diagram shown?
Selected Answer:
The activation energy is 100 kJ.
Correct Answer:
The activation energy is 100 kJ.
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Question 12
0 out of 2.5 points
Which of the following statements concerning the reaction below is FALSE?
2HgO(s) → 2Hg(l) + O2(g) ΔH = 182 kJ
Selected Answer:
91 kJ of energy are required for every mole of HgO that reacts.
Correct Answer:
The energy of the reactants is greater than the energy of the products.
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Question 13
2.5 out of 2.5 points
When the isotope
undergoes standard beta decay, what isotope is formed?
Selected Answer:
None of these answers are correct
Correct Answer:
None of these answers are correct
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Question 14
2.5 out of 2.5 points
Liquid diethyl ether contains an extensive network of intermolecular hydrogen bonds.

Selected Answer:
False
Correct Answer:
False
Question 15
2.5 out of 2.5 points
What is true about a solution whose pH is less than 7?
Selected Answer:
It has a hydronium ion concentration that is higher than pure water itself.
Correct Answer:
It has a hydronium ion concentration that is higher than pure water itself.
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Question 16
2.5 out of 2.5 points
Hexylresorcinol is listed as an active ingredient in some mouthwashes and throat
lozenges. The IUPAC name for hexylresorcinol is 4-hexyl-3-hydroxyphenol. Which of
the following is its structure?
Selected Answer:
Correct Answer:
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Question 17
2.5 out of 2.5 points
The formation of a disulfide bond (-S-S-) between two sulfhydryl groups (-SH) is an
oxidation process.

Selected Answer:
True
Correct Answer:
True
Question 18
2.5 out of 2.5 points
What is the IUPAC name of the compound below?
Selected Answer:
trans-2-bromo-3-hexene
Correct Answer:
trans-2-bromo-3-hexene
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Question 19
2.5 out of 2.5 points
Cortisol is an anti-inflammatory agent that also regulates carbohydrate metabolism.
Which of the following best describes the types of alcohols present in cortisol?
Selected Answer:
none of these answers are correct
Correct Answer:
none of these answers are correct
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Question 20
2.5 out of 2.5 points
The names meta-dimethylbenzene and 1, 2-dimethylbenzene refer to the same compound.

Selected Answer:
False
Correct Answer:
False
Question 21
2.5 out of 2.5 points
Which statement is false concerning solutions?
Selected Answer:
Colloidal suspensions are solutions.
Correct Answer:
Colloidal suspensions are solutions.
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Question 22
2.5 out of 2.5 points
A metastable isotope decays by emitting a gamma ray.
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Selected Answer:
True
Correct Answer:
True
Question 23
2.5 out of 2.5 points
A 50-mg sample of iodine-131 was placed in a container 32.4 days ago. If its half-life is
8.1 days, how many milligrams of iodine-131 are now present?
Selected Answer:
3.1 mg
Correct Answer:
3.1 mg
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Question 24
2.5 out of 2.5 points
The compound ortho-dichlorobenzene has substituents on which carbon atoms of the
benzene ring?
Selected Answer:
C1 and C2
Correct Answer:
C1 and C2
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Question 25
2.5 out of 2.5 points
A reaction that leads to a decrease in the enthalpy of the system is always spontaneous.

Selected Answer:
False
Correct Answer:
False
Question 26
0 out of 2.5 points
Doubling the distance from a source of radioactivity will halve the radiation intensity.

Selected Answer:
True
Correct Answer:
False
Question 27
0 out of 2.5 points
How many secondary and tertiary carbons, respectively, are in the following compound?
Selected Answer:
3, 3
Correct Answer:
2, 3
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Question 28
2.5 out of 2.5 points
Why do radiation workers wear a film badge?
Selected Answer:
to measure their cumulative level of exposure to radiation
Correct Answer:
to measure their cumulative level of exposure to radiation
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Question 29
2.5 out of 2.5 points
1,2-Ethanediol is a by-product of the hydrolysis of fats.

Selected Answer:
False
Correct Answer:
False
Question 30
2.5 out of 2.5 points
The conversion of Fe2+ to Fe3+ is an oxidation reaction.

Selected Answer:
True
Correct Answer:
True
Question 31
2.5 out of 2.5 points
Both 1-butene and 2-butene have cis- and trans-isomers.

Selected Answer:
False
Correct Answer:
False
Question 32
0 out of 2.5 points
How many milliliters of 12.0 M HCl are needed to prepare 250.0 mL of 2.50 M HCl solution?
Selected Answer:
25.0 mL
Correct Answer:
52.1 mL
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Question 33
2.5 out of 2.5 points
A highly-branched, non-cyclic alkane used as a lubricant contains 25 carbon atoms. How
many hydrogen atoms are present in its structure?
Selected Answer:
52
Correct Answer:
52
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Question 34
2.5 out of 2.5 points
Which structure correctly represents the major product of the following reaction?
Selected Answer:
Correct Answer:

Question 35
2.5 out of 2.5 points
Which statement is true?
Selected Answer:
If a bottle is labeled 0.10 M Ba(OH)2, the concentration of OH- ions in solution is 0.20 M.
Correct Answer:
If a bottle is labeled 0.10 M Ba(OH)2, the concentration of OH- ions in solution is 0.20 M.
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Question 36
2.5 out of 2.5 points
A buffer solution contains acetic acid (CH3COOH) at a concentration of 0.225 M and
sodium acetate (CH3COO-Na+) at a concentration of 0.164 M. The value of Ka for acetic
acid is 1.75 × 10–5. What is the pH of this buffer solution?
Selected Answer:
4.62
Correct Answer:
4.62
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Question 37
2.5 out of 2.5 points
There is only one stable alkane of formula C4H10.

Selected Answer:
False
Correct Answer:
False
Question 38
2.5 out of 2.5 points
Complete combustion of a hydrocarbon compound in oxygen produces carbon dioxide
and hydrogen.

Selected Answer:
False
Correct Answer:
False
Question 39
2.5 out of 2.5 points
Nuclei with 84 or more protons are radioactive.

Selected Answer:
True
Correct Answer:
True
Question 40
2.5 out of 2.5 points
The reaction shown below is at equilibrium. Use Le Chatelier's principle to predict the
effect of adding ammonia gas to the equilibrium reaction mixture.
N2(g) + 3H2(g)
2NH3(g)
Selected Answer:
None of these answers are correct.
Correct Answer:
None of these answers are correct.