Chemistry Chapter 11 Test Questions – Flashcards
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If force is held constant as surface area decreases, pressure
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increases
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What does the constant bombardment of gas molecules against the inside walls of a container produce?
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pressure
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Why does a can collapse when a vacuum pump removes air from the can?
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The unbalanced outside force from atmospheric pressure crushes the can.
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Which instrument measures atmospheric pressure?
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barometer
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If the height of mercury in a barometer at 0 degrees C is less then 760 Hg, then
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the atmospheric pressure is less than standard atmospheric pressure.
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Convert the pressure 0.75 atm to mm Hg.
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570 mm Hg
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Convert the pressure 2.50 atm kPa.
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253 kPa
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Standard temperature is exactly
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0 degrees C
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Standard pressure is exactly
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1 atm.
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Who developed the concept that the total pressure of a mixture of gases is the sum of their partial pressure?
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Dalton
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Three samples of gas each exert 740. mm Hg in separate 2 L containers. What pressure do they exert if they are all placed in a single 2 L container?
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2.22 x 10^3 mm Hg
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What is the partial pressure of water vapor in oxygen gas collected by water displacement at 10 Degrees C and 750 mm Hg?
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9.2 mm Hg
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A sample of gas is collected by water displacement at 600.0 mm Hg and 30 degrees C. What is the partial pressure of the gas?
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568.2 mm Hg
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The volume of a gas is 400.0 mL when the pressure is 1.00 atm. At the same temperature, what is the pressure at which the volume of the gas is 2.0 L?
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.20 atm
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A sample of oxygen occupies 560. mL when the pressure is 800.00 mm Hg. At constant temperature, wheat volume does the gas occupy when the pressure decreases to 700.0 mm Hg.
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640. mL
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if the temperature of a fixed quantity of gas decreases and he pressure remains unchanged,
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its volume decreases.
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at 7.0 degrees C, the volume of a gas is 49 mL. At the same pressure, its volume is 74 mL at what temperature?
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150 degrees C
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The volume of a gas is 93 mL when the temperature is 91 degrees C. IF the temperature is reduced to 0 Degrees C without changing the pressure, what is the new volume of the gas
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70. mL
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Why could the pressure of a sample of gas at a constant volume fall 75 mm Hg?
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The temperature decreased.
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Why does the air pressure inside the tires of a car increase when the car is driven?
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The air particles inside the tire increase their speed because their temperature rises.
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On a cold winter morning when teh temperatrue is -13 degrees C, the air pressure in an automobile is 1.5 atm. If the colume does not change, waht is the pressure after the tire has warmed to 15 degrees C?
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1.7 atm
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The pressure of a sample of gas at 10.0 degrees C increases form 700. mm Hg. What is the new temperature?
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90.9 Degrees C
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The volume of a sample of oxygen is 300.0 mL when the pressure is 1.00 atm and the temperature is 27.0 Degrees C. At what temperature is the volume 1.00 L and the pressure 0.500 atm?
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227 Degrees C
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The volume of a gas collected when the temperature is 11.0 degrees and the pressure is 710 mm Hg measures 14.8 mL. What is the calculated volume of the gas at 20.0 degrees C and 740 mm Hg?
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14.6 mL
