AP Chemistry Unit 3

Front

According to kinetic molecular theory, in which of the following gases will the root mean square speed of the molecules be the highest at 200ºC? Options: SF₆, H₂O, HCl, Cl₂, None, the molecules of all gases have the same root mean square speed at any given temperature.

Back

H₂O

Front

A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10.0 L to 15.0 L. The final pressure is ___ atm.

Back

0.67 atm

Front

A sample of He gas (2.35 mol) occupies 57.9 L at 300.0 K and 1.00 atm. What is the volume of this sample at 423 K and 1.00 atm?

Back

81.6 L

Front

The volume of a sample of gas (2.49 g) is 752 mL at 1.98 atm and 62ºC. What is the gas? Options: NO₂, SO₃, SO₂, Ne, NH₃

Back

NO₂

Front

Gases generally have

Back

low density

Front

Which assumption of kinetic molecular theory describes why gases are extremely fluid?

Back

particles do  not attract or repel one another

Front

What are the values for STP?

Back

0^oC and 1 atm

Front

What is the pressure in a container that has 3 atm H_2, 2 atm of N₂ and 5 atm of F₂?

Back

10 atm

Front

Under what conditions do real gases most resemble ideal gases? Options: low pressure & high temperature, low pressure & low temperature, high pressure & high temperature, high pressure & low temperature

Back

low pressure & high temperature

Front

How are pressure and temperature related?

Back

Directly