AP Chemistry Gas Laws

The system shown above is at equilibrium at 28 °C. At this temperature, the vapor pressure of water is 28 millimeters of mercury. The partial pressure of O2(g) in the system is

• 28 mm Hg

• 56 mm Hg

• 133 mm Hg

• 161 mm Hg

At 25°C, a sample of NH3 (molar mass 17 grams) effuses at the rate of 0.050 mole per minute. Under the same conditions, which of the following gases effuses at approximately one-half that rate?

• O₂ (molar mass 32 g/mol)

• He (molar mass 4.0 g/mol)

• CO₂ (molar mass 44 g/mol)

• Cl₂ (molar mass 71 g/mol)

Samples of F2 gas and Xe gas are mixed in a container of fixed volume. The initial partial pressure of the F2 gas is 8.0 atmospheres and that of the Xe gas is 1.7 atmospheres. When all of the Xe gas reacted, forming a solid compound, the pressure of the unreacted F2 gas was 4.6 atmospheres. The temperature remained constant. What is the formula of the compound?

• XeF

• XeF₃

• XeF₄

• XeF₆

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-4

A sample of 9.00 grams of aluminum metal is added to an excess of hydrochloric acid. The volume of hydrogen gas produced at standard temperature and pressure is

• 22.4 Liters

• 11.2 Liters

• 7.46 Liters

• 5.60 Liters

Molecular compounds of a low molar weight are likely to be a gas at room temperatures. Which of the following is most likely not a gas at room temperature?

• LiCl

• H₂

• HCl

• CH₄

• Cl₂

Tags

NGSS.HS-PS1-5

Charles' Law States...

• As Pressure goes up volume goes down

• As Pressure goes up temperature goes up

• As Volume goes up temperature goes up 

• As Pressure goes down volume goes down 

True or False: Gases can be compressed. 

• True

• False

What type of relationship to pressure and volume have?

• direct

• inverse

• no relationship

• I don't know

The relationship of which two variables are compared in Boyle's Law?

• pressure & volume

• volume & temperature

• temperature & pressure

• volume & moles (amount of gas)

Boyle's law : When _______ is held constant, the pressure and volume of a gas are ________  proportional

• temperature,  equally

• mass, inversely

• temperature, inversely

• mass, equally