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AP Chemistry--GASES

Total questions: 15

Worksheet time: 40mins

Name
Class
Date
1.
What are the values for STP?
a)
0 K and 1 atm
b)
0oC and 1 atm
c)
760 K and 1 atm
d)
273oC and 1 atm
2.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.
a)
7.18 L 
b)
7.81 L
c)
4.63 L
d)
4.36 L
3.

What is the pressure in a container that has 3 atm H2, 2 atm of N2 and 5 atm of F2?

a)

2 atm

b)

3 atm

c)

5 atm

d)

10 atm

4.

Collisions where no energy is lost are

a)

epileptic

b)

elastic

c)

erectic

d)

erratic

5.

Find the density of neon gas at 0.725 atm and 25°C [Mm =20.18]

a)

0.35

b)

0.47

c)

0.60

d)

0.79

6.
An important idea of the kinetic theory is that particles of matter 
a)
are in constant motion
b)
have different shapes
c)
have different colors
d)
are always fluids
7.
The conditions under which real gases most resemble ideal gases are 
a)
low pressure & high temperature
b)
low pressure & low temperature
c)
high pressure & high temperature
d)
high pressure & low temperature
8.

A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6°C. Determine the temperature at which the volume of the gas is 3.42 L.

a)

312K

b)

278K

c)

20.4K

d)

295K

e)

552K

9.

How are pressure and temperature related?

a)

Directly

b)

Indirectly

c)

They aren't related

10.
Gas pressure is caused by
a)
gas molecules colliding with surfaces
b)
gas molecules condensing to a liquid
c)
gas molecules hitting other gas molecule
d)
barometers
11.
a)
Since all flask have same amount of gas, flask 1 has the least pressure
b)
Since all flask have same amount of gas, flask 2 has the least pressure
c)
Since all flask have same amount of gas, flask 3 has the least pressure
d)
Since all flask have same amount of gas, flask 4 has the least pressure
12.

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?

a)

SF6

b)

H2O

c)

HCl

d)

Cl2

e)

None, the molecules of all gases have the same root mean square speed at any given temperature.

13.

The volume of a 2.49 g sample of gas is 752 mL at 1.98 atm and 62ºC. What is the gas?

a)

NO2

b)

SO3

c)

SO2

d)

Ne

e)

NH3

14.

Use the following equation (balance it first!):

NaH + H2O --> NaOH + H2

A sample of NaH weighing ___ g will produce 982 mL of hydrogen gas at 28ºC and 765 torr, when the hydrogen is collected over water. The vapor pressure of water at this temperature is 28 torr.

a)

0.960 g

b)

925 g

c)

0.0388 g

d)

2.93 g

e)

0.926 g

15.

At 333 K, which of the pairs of gases below would have the most nearly identical rates of effusion?

a)

CO and CO2

b)

CO and N2

c)

NO2 and N2O4

d)

N2O and NO2

e)

N2 and O2