AP Chemistry mid-term/yr long review.

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

A sample of 3.0 grams of an ideal gas at 127°C and 1.0 atmosphere pressure has a volume of 1.5 liters. Which of the following expressions is correct for the molar mass of the gas? The ideal gas constant, R, is 0.08 (L ⋅ atm)/(mole ⋅ K).

• [(0.08)(400)] /[(3.0)(1.0)(1.5)]

• [(1.0)(1.5)]/ [(3.0)(0.08)(400)]

• [(0.08)(1.0)(1.5)] /[(3.0)(400)]

• [(3.0)(0.08)(400)] /[(1.0)(1.5)]

P and V are ___________________ related?

• inversely

• directly

The more molar mass a gas has, the_________________ it moves

• faster

• slower

Average Kinetic Energy is another term for _____________.

• Heat

• Temperature

• Pressure

• Activation energy

What are the values for STP?

• 0 K and 1 atm
• 0^oC and 1 atm
• 760 K and 1 atm
• 273^oC and 1 atm

Under STP, how many liters is 1 mol?

• 1 L

• 11.2 L

• 22.4 L

Real gases behave most like an ideal gas at what conditions of temperature and pressure?

• High T, Low P

• High P, Low T

• High V, Low T

Polar substances will dissolve in what type of substances?

• Ionic

• Polar

• Non-Polar

• Metallic

The graph represents an

• Exothermic Reaction

• Endothermic Reaction