Gas Laws Chemistry

Under what conditions do gases behave ideally?

• low pressure and low temperature

• low pressure and high temperature

• high pressure and low temperature

• high pressure and high temperature

A gaseous mixture containing 7.0 moles of nitrogen, 2.5 moles of oxygen, and 0.5 moles of helium exerts a total pressure of 0.90 atmosphere. What is the partial pressure of the nitrogen?

• 0.13 atm

• 0.27 atm

• 0.63 atm

• 0.90 atm

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

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

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 

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-PS1-1

Compare Boyle's Law and Charles's Law in terms of their formulas and applications.

• Boyle's Law: P1V1 = P2V2, Charles's Law: P1V1 = P2V2

• Boyle's Law: V1T1 = V2T2, Charles's Law: P1V1 = P2V2

• Boyle's Law: V1/T1 = V2/T2, Charles's Law: P1V1 = P2V2

• Boyle's Law: P1V1 = P2V2, Charles's Law: V1/T1 = V2/T2

How does gas behavior change under varying pressure according to Boyle's Law?

• Gas behavior changes under varying pressure according to Avogadro's Law.

• Gas behavior changes under varying pressure by increasing volume with increasing pressure.

• Gas behavior changes under varying pressure according to Charles's Law.

• Gas behavior changes under varying pressure according to Boyle's Law by exhibiting an inverse relationship between pressure and volume.

How does gas behavior change under varying temperature according to Charles's Law?

• Gas behavior changes under varying temperature according to Charles's Law by directly affecting the volume of the gas.

• Gas behavior changes under varying temperature according to Charles's Law by influencing the taste of the gas.

• Gas behavior changes under varying temperature according to Charles's Law by altering the chemical composition of the gas.

• Gas behavior changes under varying temperature according to Charles's Law by affecting the color of the gas.

Tags

NGSS.MS-PS1-4