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Exam 11: Gases

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Question 41

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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?

A) 0°C
B) 38°C
C) 95°C
D) 273°C
E) none of the above

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Question 42

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Gases and liquids are compressible,but solids are not.

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Question 43

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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)

What is the major component of the air we breathe?

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.

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)

Absolute zero refers to 0°C.

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.

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

Gas particles act independently of each other.

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.

The vapor pressure of water is independent of temperature.

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)

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

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

A pedometer is a device created by Torricelli to measure pressure.

1 torr is equal to:

The volume of 9.00 grams of water vapor at STP is 11.2 L.

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

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