Multiple Choice
Identify the letter of the choice that best completes
the statement or answers the question.
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1.
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How
many mole ratios can be correctly obtained from the chemical equation
2NO ® N2 + O2?
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2.
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What
is the mole ratio of oxygen to phosphorus(V) oxide in the reaction
P4(s) + 5O2(g) ® P4O10(s)?
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3.
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The
equation A + X ® AX is the general equation for a(n) a. | double-displacement
reaction. | c. | ionic reaction. | b. | synthesis reaction. | d. | combustion reaction. | | | | |
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4.
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In the
reaction 2H2 + O2 ® 2H2O, what is the mole ratio of oxygen to
water?
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5.
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Vapor
pressure is measured when a liquid and its vapor are a. | in equilibrium. | c. | in one phase. | b. | at standard temperature. | d. | Both (a) and (b) | | | | |
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6.
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In the
reaction, CH4(g) + 2O2(g) ® CO2(g) +
2H2O(g), a mass of 25 g CO2 is produced by reacting methane
with excess oxygen. The following expression calculates the
a. | moles of carbon
dioxide produced. | c. | minimum mass of
oxygen needed. | b. | moles of methane
consumed. | d. | mass of water
produced. | | | | |
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7.
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A
sample of a gas has a pressure of 3.00 atm at 25°C. What would the gas pressure be at 52°C,
if the volume remains constant? a. | 1.44 atm | c. | 2.75 atm | b. | 6.24 atm | d. | 3.27 atm | | | | |
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8.
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What
happens to the volume of a gas during compression? a. | The volume increases. | b. | The volume decreases. | c. | The volume remains constant. | d. | It is impossible to tell because all gases are
different. | | |
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9.
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Which
coefficients correctly balance the formula equation
CaCO3(s) ® CaO(s) + CO2(g)? a. | 1, 3, 1 | c. | 1, 1, 1 | b. | 3, 1, 2 | d. | 2, 6, 3 | | | | |
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10.
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The
equation A + BX ® AX + B is the general equation for a a. | decomposition reaction. | c. | displacement reaction. | b. | double-displacement
reaction. | d. | combustion
reaction. | | | | |
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11.
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The
coefficients in a chemical equation represent the a. | number of atoms in each compound in a
reaction. | b. | number of valence
electrons involved in the reaction. | c. | masses, in grams, of all reactants and
products. | d. | relative numbers
of moles of reactants and products. | | |
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12.
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Standard temperature and pressure for a gas is a. | 0°C and 1 Pa. | c. | 0 K and 1 atm. | b. | 0°C and 1 atm. | d. | 0 K and 1 Pa. | | | | |
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13.
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Which
substance has the lowest density? a. | H2O(aq) | c. | H2O(g) | b. | H2O(l) | d. | H2O(s) | | | | |
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14.
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The
average atmospheric pressure in Denver is 0.830 atm. What is this pressure in kPa? a. | 8.19 ´ 10–3
kPa | c. | 84.1 kPa | b. | 100 kPa | d. | 102 kPa | | | | |
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15.
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How
does a gas expand? a. | Collisions between particles become
elastic. | b. | Its temperature
rises. | c. | Its particles
become larger. | d. | Its particles
move farther apart. | | |
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16.
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In
what kind of reaction do two or more substances combine to form a new compound? a. | ionic reaction | c. | decomposition reaction | b. | double-displacement
reaction | d. | synthesis reaction | | | | |
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17.
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A real
gas a. | consists of particles that do not occupy
space. | b. | cannot be
condensed. | c. | does not obey all
the assumptions of the kinetic-molecular theory. | d. | cannot be produced in scientific
laboratories. | | |
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18.
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If the
temperature remains constant, V1 and P1 represent the original
volume and pressure, and V2 and P2 represent the new volume and
pressure, what is the mathematical expression for Boyle’s law? a. | V1V2 =
P1P2 | c. | P2V1 =
V2P1 | b. | | d. | P2V2
= V1P1 | | | | |
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19.
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What
is the SI unit of pressure? a. | torr | c. | newton | b. | pound | d. | pascal | | | | |
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20.
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What
is the molar mass of magnesium? a. | 26.982 g | c. | 24.305 g | b. | 12.00 g | d. | 22.990 g | | | | |
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21.
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If the
particles in a sample of matter have an orderly arrangement and move only in place, the sample is
a a. | solid. | c. | gas. | b. | liquid. | d. | substance. | | | | |
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22.
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The
reaction Cl2(g) + 2KBr(aq) ® 2KCl(aq) + Br2(l)
is a(n) a. | displacement
reaction. | c. | combustion
reaction. | b. | ionic
reaction. | d. | synthesis reaction. | | | | |
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23.
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In the
above figure, point B represents the _____ of water, and point C represents the ____ of
water. a. | normal freezing
point, normal boiling point | b. | normal boiling point, normal freezing
point | c. | critical point of
the liquid, critical point of the vapor | d. | vapor pressure, atmospheric
pressure | | |
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24.
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A
solid with a low melting point is most likely a. | metallic. | c. | covalent. | b. | ionic. | d. | None of the above | | | | |
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25.
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In the
reaction N2 + 3H2 ® 2NH3, what is the mole ratio of nitrogen to
ammonia?
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26.
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An
insoluble solid produced by a chemical reaction in solution is called a. | a precipitate. | c. | a reactant. | b. | a molecule. | d. | the mass of the product. | | | | |
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27.
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A
reaction of a hydrocarbon, in which carbon dioxide and water are produced, is classified as
a a. | double-displacement
reaction. | c. | combustion
reaction. | b. | synthesis
reaction. | d. | decomposition
reaction. | | | | |
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28.
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Which
coefficients correctly balance the formula equation
Zn(OH)2 + CH3COOH ® Zn(CH3COO)2 +
H2O? a. | 1, 2, 1,
1 | c. | 1, 2, 1, 2 | b. | 2, 1, 1, 2 | d. | 2, 1, 2, 1 | | | | |
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29.
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The
word equation for the formula equation shown is
C2H5OH + O2 ® CO2 + H2O +
energy a. | ethanol + oxygen
® carbon dioxide + water + energy. | b. | ethanol + oxygen + energy ® carbon dioxide + water +
energy. | c. | ethanol + oxygen
+ energy ® carbon dioxide + water. | d. | carbon dioxide + water ® ethanol + oxygen +
energy. | | |
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30.
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What
is the balanced equation when aluminum reacts with copper(II) sulfate? a. | Al + CuSO4 ® AlSO4 +
Cu | c. | Al + Cu2S ® Al2S +
Cu | b. | 2Al +
3CuSO4 ® Al2(SO4)3 +
3Cu | d. | 2Al + Cu2SO4 ®
Al2SO4 + 2Cu | | | | |
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31.
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In
what kind of reaction does a single compound produce two or more simpler substances? a. | ionic reaction | c. | decomposition reaction | b. | displacement reaction | d. | synthesis reaction | | | | |
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32.
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Which
coefficients correctly balance the formula equation
NH4NO2 ® N2 + H2O? a. | 1, 2, 2 | c. | 1, 1, 2 | b. | 2, 2, 2 | d. | 2, 1, 1 | | | | |
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33.
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In the
reaction Ca + Cl2 ® CaCl2, what is the mole ratio of chlorine to calcium
chloride?
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34.
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The
products of the reaction, C2H5OH + 3O2 ® 2CO2 +
3H2O have the same _____ as the reactants. a. | atoms. | c. | molecules. | b. | subscripts. | d. | coefficients. | | | | |
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35.
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What
is the pH of a neutral solution at 25°C?
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36.
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A
water solution whose pH is 4 a. | is always neutral. | c. | is always acidic. | b. | is always basic. | d. | might be neutral, basic or
acidic. | | | | |
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37.
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A
water solution whose pH is 10 a. | is always neutral. | c. | is always acidic. | b. | is always basic. | d. | might be neutral, basic or
acidic. | | | | |
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38.
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What
is the formula for phosphoric acid?
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39.
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The
name for an alkyl group that contains two carbon atoms is ____. a. | diphenyl | c. | dimethyl | b. | ethyl | d. | propyl | | | | |
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40.
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Which
of the following compounds is an unsaturated hydrocarbon? a. | methane | c. | nonane | b. | propyne | d. | methyl | | | | |
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