Section 14.4
Gas Stoichiometry
Practice Test
1.
Calculate the number of moles of gas contained in a 16.0-L vessel at 373 K with a pressure of 2.50 atm.
a.
2.8 x 10
-3
mol
b.
1.31 x 10
-1
mol
c.
0.766 mol
d.
1.31 mol
Hint
2.
Determine the Celsius temperature of 1.50 moles of ammonia contained in a 10.0-L vessel under a pressure of 2.0 atm.
a.
-111
b.
162°C
c.
-50°C
d.
0.0°C
Hint
3.
A gaseous compound is 30.6% nitrogen and 69.4% oxygen by mass. A 5.25-g sample of the gas occupies a volume of 1.00 L and exerts a pressure of 1.26 atm at –4.0°C. What is the molecular formula for the gas?
a.
NO
b.
NO
2
c.
N
3
O
6
d.
N
2
O
4
Hint
4.
A 10.0-L vessel contains gas A at a pressure of 300.0 torr. A 3.00-L vessel contains gas B at a pressure of 400.0 torr. Gas A is forced into the second vessel. Calculate the resulting pressure in torr. Assume the temperature remains constant.
a.
1000 torr
b.
1400 torr
c.
1800 torr
d.
2000 torr
Hint
