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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The
kinetic-molecular theory explains the behavior of a. | gases only. | c. | liquids and gases. | b. | solids and
liquids. | d. | solids, liquids,
and gases. | | | | |
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2.
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According to the kinetic-molecular theory, what is the most significant difference
between gases and liquids? a. | the shapes of the particles | b. | the mass of each
particle | c. | the distance between the particles | d. | the type of
collision that occurs between particles | | |
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3.
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According to the kinetic-molecular theory, how does a gas expand? a. | Its particles
become larger. | b. | Collisions between particles become
elastic. | c. | Its temperature rises. | d. | Its particles
move greater distances. | | |
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4.
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Pressure is the force per unit a. | volume. | c. | length. | b. | surface
area. | d. | depth. | | | | |
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5.
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What
does the constant bombardment of gas molecules against the inside walls of a container
produce? a. | temperature | c. | pressure | b. | density | d. | diffusion | | | | |
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6.
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Why
does a can collapse when a vacuum pump removes air from the can? a. | The inside and
outside forces balance out and crush the can. | b. | The unbalanced
outside force from atmospheric pressure crushes the can. | c. | The atmosphere
exerts pressure on the inside of the can and crushes it. | d. | The vacuum pump
creates a force that crushes the can. | | |
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7.
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Standard temperature is exactly a. | 100ºC. | c. | 0ºC. | b. | 273ºC. | d. | 0
K. | | | | |
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8.
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If
the pressure and temperature of a gas are held constant and some gas is added to the container or
some is allowed to escape, a change in which of the following can be observed? a. | kinetic
energy | c. | elasticity | b. | volume | d. | fluidity | | | | |
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9.
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Suppose the temperature of the air in a balloon is increased. If the pressure remains
constant, what quantity must change? a. | volume | c. | compressibility | b. | number of
molecules | d. | adhesion | | | | |
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10.
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If
the temperature of a container of gas remains constant, how could the pressure of the gas
increase? a. | The mass of the
gas molecules increases. | b. | The diffusion of the gas molecules
increases. | c. | The size of the container increases. | d. | The number of
gas molecules in the container increases. | | |
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11.
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Pressure and volume changes at a constant temperature can be calculated
using a. | Boyle's
law. | c. | Kelvin's
law. | b. | Charles's
law. | d. | Dalton's
law. | | | | |
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12.
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If
V, P, and T represent the original volume, pressure, and temperature in the
correct units, and V', P', and T' represent the new conditions, what is the
combined gas law?
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Water Vapor
Pressure
Temperature (ºC) | Pressure (mm
Hg) | 0 | 4.6 | 5 | 6.5 | 10 | 9.2 | 15 | 12.8 | 20 | 17.5 | 25 | 23.8 | 30 | 31.8 | 35 | 42.2 | 40 | 55.3 | 50 | 92.5 | | |
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13.
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A
sample of gas is collected by water displacement at 600.0 mm Hg and 30ºC. What is the partial
pressure of the gas? a. | 568.2 mm Hg | c. | 630 mm Hg | b. | 600.0 mm
Hg | d. | 631.8 mm
Hg | | | | |
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14.
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If
gas A has a molar mass greater than that of gas B and samples of each gas at identical temperatures
and pressures contain equal numbers of molecules, then a. | the volumes of
gas A and gas B are equal. | b. | the volume of gas A is greater than that of gas
B. | c. | the volume of
gas B is greater than that of gas A. | d. | their volumes are proportional to their molar
masses. | | |
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15.
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The
expression V = kn is a statement of a. | the ideal gas law. | c. | Graham's law of effusion. | b. | the law of
combining volumes. | d. | Avogadro's
principle. | | | | |
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16.
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The
standard molar volume of a gas is all of the following except a. | the volume
occupied by 1 mol of a gas at STP. | b. | equal for all gases under the same
conditions. | c. | 22.4 L at STP. | d. | dependent upon
the size of the molecules. | | |
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17.
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All
of the following equations are statements of the ideal gas law except
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18.
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A gas
sample with a mass of 0.467 g is collected at 20.ºC and 732.5 mm Hg. The volume is 200. mL. What
is the molar mass of the gas? a. | 58 g/mol | c. | 290 g/mol | b. | 180
g/mol | d. | 730
g/mol | | | | |
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19.
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What
is the number of moles of H2 produced when 23 g of sodium react with water according to
the equation 2Na(s) + 2H2O(l) ® 2NaOH(aq) + H2(g)? a. | 0.50
mol | c. | 2
mol | b. | 1
mol | d. | 4
mol | | | | |
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20.
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When
carbon burns, carbon dioxide is produced by the reaction C + O2 ® CO2.
If 14 L of CO2 are produced at STP, how many grams of carbon (atomic mass 12) were
used? a. | 7.5
g | c. | 17.5
g | b. | 11.2
g | d. | 75
g | | | | |
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21.
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According to the kinetic-molecular theory, particles of a gas a. | attract each
other but do not collide. | b. | repel each other and collide. | c. | neither attract
nor repel each other but collide. | d. | neither attract nor repel each other and do not
collide. | | |
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22.
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The
volume of a gas collected when the temperature is 11.0ºC and the pressure is 710 mm Hg measures
14.8 mL. What is the calculated volume of the gas at 20.0ºC and 740 mm Hg? a. | 7.8
mL | c. | 14.6
mL | b. | 13.7
mL | d. | 15
mL | | | | |
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23.
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To
correct for the partial pressure of water vapor, the vapor pressure of H2O at the
collecting temperature is a. | divided by 22.4. | c. | subtracted from the total gas
pressure. | b. | multiplied by 22.4. | d. | added to the total gas pressure. | | | | |
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