Mixed Gas Laws

A gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume

becomes 15.0 L?

• 195 L

• 1.15 atm

• 0.642 atm

If the temperature of a gas remains constant and the pressure is raised, what happens to the volume?

• increases

• stays the same

• I dunno!

• decreases

If there are 5.0 moles of CO₂ in a container, how many molecules of CO₂ are present?

• 8.31 x 10^-24 molecules

• 3.01 x 10²⁴ molecules

• 3.01 molecules

Nitrogen gas at 300.0 K occupies

a volume of 500.0 mL. To what temperature should it be heated to lower the

volume to 250.0 mL?

• 600.0 K

• 150.0 K

• 416.6 K

How many moles of H₂O can be formed when there are

4.55 x 10²⁴ molecules of H₂O?

• 2.73 x 10⁴⁸ moles

• 0.132 moles

• 7.56 moles

If the pressure of a gas remains constant and the volume decreases, what happens to the temperature?

• Decreases

• Stays the same

• Increases

An ideal gas occupies 400.0ml

at 270.0 mm Hg and 65°C. If the pressure is changed to 760 mm Hg

and the temperature is increased to 100.0°C, what is the new volume?

• 1242.52 mL

• 128.8 mL

• 156.8 mL

A constant volume of

oxygen is heated from 100.0°C to 185.0°C. The initial pressure is 4.10 atm. What is the final pressure?

• 5.03 atm

• 3.34 atm

• 41666.8 atm

Which quantity represents 1 mole of a substance?

• 30.0 grams

• 6.02 x 10²³ particles

• 12 particles

In a closed chamber, 58 grams of propane (C₃H₈) gas and 220 grams of oxygen gas( O₂) are sparked to initiate the combustion reaction shown below.

1C₃H₈(g) + 50₂(g) --> 3C0₂(g) + 4H₂0(/)

What is the limiting reagent in this reaction?

• O₂

• C₃H₈

• CO₂

• H₂O