Exam 11: Gases

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Which of the following statements is TRUE for gases? 1.The temperature of a gas is inversely proportional to its pressure. 2.The volume of a gas is directly proportional to the pressure in torr. 3.The pressure of a gas is due to collisions of the gas molecules.

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A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C.What is the noble gas? (R= 0.0821 L atm/ mol K)

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What is the final volume of a balloon that was initially 500.0 mL at 25°C and was then heated to 50°C?

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If you had a five liter balloon of argon gas and a five liter balloon of xenon gas,and you removed 10 grams of gas from each balloon,the balloons would both shrink down to the same size.

(True/False)
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Which of the following diatomic elements would have a mass of 19.08 grams stored in a Which of the following diatomic elements would have a mass of 19.08 grams stored in a   container at   and 100°C? (R= 0.0821 L atm/ mol K) container at Which of the following diatomic elements would have a mass of 19.08 grams stored in a   container at   and 100°C? (R= 0.0821 L atm/ mol K) and 100°C? (R= 0.0821 L atm/ mol K)

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To solve problems using Avogadro's Law,which mathematical equation should be used?

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What is the volume (in liters)of 1.00 mole of krypton gas that has a pressure of 1140 mm Hg and a temperature of 25.0°C? (R= 0.0821 L atm/ mol K)

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Aerosol spray cans contain gas trapped in a fixed volume and cans of this type can explode if heated to high temperature.This illustrates that pressure and temperature are directly proportional.

(True/False)
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A sealed bag of potato chips will expand when taken to a higher altitude.This is an example of Boyle's law.

(True/False)
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If the column of mercury in a barometer drops to a lower reading,this means the measured pressure has decreased.

(True/False)
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The vapor pressure of water is independent of temperature.

(True/False)
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1 torr is equal to:

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Gas particles act independently of each other.

(True/False)
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What is the major component of the air we breathe?

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The unit of pressure known as the atmosphere (atm)is defined as the average pressure found at the top of Mount Everest.

(True/False)
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A balloon originally had a volume of 0.439 L at 44°C and a pressure of 729 torr.To what temperature must the balloon be cooled to reduce its volume to 378 mL if the pressure remained constant?

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Gases and liquids are compressible,but solids are not.

(True/False)
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Absolute zero refers to 0°C.

(True/False)
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The volume of 9.00 grams of water vapor at STP is 11.2 L.

(True/False)
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A pedometer is a device created by Torricelli to measure pressure.

(True/False)
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