Ch. 13 Prep-Test - Gases
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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According to the kinetic-molecular theory, particles of matter
a. | are in constant motion. | c. | have different
colors. | b. | have different shapes. | d. | are always fluid. |
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2.
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An ideal gas is an imaginary gas
a. | not made of particles. | b. | that conforms to all of the assumptions of the
kinetic theory. | c. | whose particles have zero mass. | d. | made of motionless
particles. |
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3.
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Unlike in an ideal gas, in a real gas
a. | all particles move in the same direction. | b. | all particles have
the same kinetic energy. | c. | the particles cannot
diffuse. | d. | the particles exert attractive forces on each other. |
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4.
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What happens to the volume of a gas when you increase pressure on it?
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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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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What instrument measures atmospheric pressure?
a. | barometer | c. | vacuum pump | b. | thermometer | d. | torrometer |
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7.
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A pressure of 745 mm Hg equals
a. | 745 torr. | c. | 1 pascal. | b. | 1 torr. | d. | 745 pascal. |
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8.
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Convert the pressure 0.75 atm to mm Hg.
a. | 101.325 mm Hg | c. | 570 mm Hg | b. | 1430 mm Hg | d. | 760 mm Hg |
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9.
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Convert the pressure 2.50 atm to kPa.
a. | 1 kPa | c. | 760 kPa | b. | 253 kPa | d. | 1000 kPa |
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10.
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Standard pressure is exactly
a. | 1 atm. | c. | 101.325 atm. | b. | 760 atm. | d. | 101 atm. |
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11.
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If the temperature of a fixed quantity and volume of gas changes,
what also changes?
a. | pressure | c. | mass | b. | density | d. | formula |
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12.
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The pressure of a sample of helium is 2.0 atm in a 200. mL container. If the
container is compressed to 10. mL without changing the temperature, what is the new pressure?
a. | 200 atm | c. | 100 atm | b. | 0.10 atm | d. | 40. atm |
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13.
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A sample of gas collected at 500. mm Hg occupies 250. mL. At constant
temperature, what pressure does the gas exert if the volume increases to 500. mL?
a. | 50. mm Hg | c. | 250. mm Hg | b. | 550. mm Hg | d. | 1000. mm Hg |
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14.
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At 380. mm Hg, a sample of nitrogen gas occupies 600. mL. What volume does the
gas occupy if the temperature remains constant and the pressure increases to 760. mm Hg?
a. | 150. mL | c. | 600. mL | b. | 300. mL | d. | 900. mL |
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15.
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The volume of a gas is 5.0 L when the temperature is 5.0ºC. If the
temperature is increased to 10.0ºC without changing the pressure, what is the new volume?
a. | 2.5 L | c. | 5.1 L | b. | 4.8 L | d. | 10.0 L |
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16.
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If a gas occupies 950. mL at standard temperature, what volume does it occupy at
546 K if the pressure remains constant?
a. | 475 mL | c. | 1000. mL | b. | 966. mL | d. | 1.90 x 103
mL |
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17.
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The pressure of a 1000. mL sample of gas at 27ºC increases from 700. mm Hg
to 1400. mm Hg. If the volume is unchanged, what is the new temperature?
a. | 18ºC | c. | 600ºC | b. | 137ºC | d. | 327ºC |
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18.
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A sample of gas at 6.0 atm and 298 K increases in temperature to 596 K. If the
volume is unchanged, what is the new pressure?
a. | 5.4 atm | c. | 36 atm | b. | 12 atm | d. | 18 atm |
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19.
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The volume of a sample of oxygen is 300.0 mL when the pressure is 1 atm and the
temperature is 27.0ºC. At what temperature is the volume 600. mL and the pressure 0.500
atm?
a. | 22.0ºC | c. | 0.50 K | b. | 45.0ºC | d. | 27.0ºC |
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20.
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A 30. L sample of gas exerts 200. mm Hg pressure at 273 K. What volume does the
gas have at 100. mm Hg and 546 K?
a. | 90 L | c. | 120 L | b. | 20 L | d. | 240 L |
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21.
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A 10.0 mL sample of gas exerts 200. mm Hg pressure at 0ºC. What pressure
does it exert at 273ºC if the volume expands to 40.0 mL?
a. | 100.0 mm Hg | c. | 10.0 mm Hg | b. | 50.0 mm Hg | d. | 20.0 mm Hg |
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22.
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If five different gases in a cylinder each exert 1 atm, what is the total
pressure exerted by the gases?
a. | 0.2 atm | c. | 1 atm | b. | 0.5 atm | d. | 5 atm |
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23.
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A sample of nitrogen is collected by water displacement at 730.0 mm Hg and
20ºC. What is the partial pressure of the nitrogen? The water vapor pressure at
20oC is 17.5 torr.
a. | 17.5 mm Hg | c. | 717.2 mm Hg | b. | 712.5 mm Hg | d. | 747.5 mm Hg |
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24.
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Why is a gas easier to compress than a liquid or a solid?
a. | Its volume increases more under pressure than an equal volume of liquid
does. | b. | Its volume increases more under pressure than an equal volume of solid
does. | c. | The space between gas particles is much greater than the space between liquid or
solid particles. | d. | The volume of a gas’s particles is the majority of the overall volume of the
gas. |
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25.
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If a balloon is squeezed, what happens to the pressure of the gas inside the
balloon?
a. | It increases. | b. | It stays the same. | c. | It
decreases. | d. | The pressure depends on the type of gas in the
balloon. |
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26.
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What happens to the pressure of a gas inside a container if the temperature of
the gas decreases?
a. | The pressure increases. | c. | The pressure
decreases. | b. | The pressure does not change. | d. | The pressure cannot be
predicted. |
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27.
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If 4 moles of gas are added to a container that already holds 1 mole of gas, how
will the pressure change inside the container?
a. | The pressure will be five times higher. | b. | The pressure will
double. | c. | The pressure will be reduced five times. | d. | The pressure will
not change. |
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28.
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Boyle's law states that ____.
a. | the volume of a gas varies inversely with pressure | b. | the volume of a gas
varies directly with pressure | c. | the temperature of a gas varies inversely with
pressure | d. | the temperature of a gas varies directly with
pressure |
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29.
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How is the ideal gas law usually written?
a. |  = R | c. | PV =
nRT | b. |  = nR | d. | P =  |
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30.
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Which law can be used to calculate the number of moles of a contained
gas?
a. | Boyle’s law | c. | ideal gas law | b. | combined gas law | d. | Charles’s
law |
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31.
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When a container is filled with 3.00 moles of H  , 2.00
moles of O  , and 1.00 mole of N  , the pressure in the container is 768 kPa. What is the partial pressure of
O  ? a. | 256 kPa | c. | 512 kPa | b. | 128 kPa | d. | 1028 kPa |
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32.
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Under which of the following sets of conditions
will a 0.50 mole sample of helium
occupy a volume of 11.2 liters? a. | 298 K and 0.90 atm. | c. | 373 K and 0.50 atm. | b. | 273 K and 1.10 atm | d. | 273 K and 1.00
atm |
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33.
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What volume will 88 grams of CO2 at a temperature of 300. K and a
pressure of 1.0 atm have?
a. | 49 L | c. | 20 L | b. | 102 L | d. | 75 L |
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