Question:
Calculate the volume of hydrogen gas collected at 0.00 oC and 1.00 atm when 25.0
grams of zinc reacts completely with hydrochloric acid?
Solution:
Mass of zinc
Zn
is
25.0 g
.
Molar mass of zinc is
.
65.4 g/mol
Calculate the number of moles of
Question:
Calculate the volume of 0.644 g of oxygen gas collected at 5 oC and 845 mmHg?
Solution:
Mass of oxygen
gas is
.
0.644 g
O2
Molar mass of oxygen is
.
32.00 g/mol
Calculate the number of moles of oxygen by multiplying the mass of oxygen with the
Question:
If 4.80 L of carbon dioxide at 18 oC and 785 mmHg is used in the experiment, what
will be the volume of the gas at 37 oC and 745 mmHg?
Solution:
Initial volume
V1
Initial pressure
of the
of the
P1
Initial temperature
CO 2
of the
T1
gas is
Question:
What is the total pressure of the nitrox gas mixture which is composed of 53 atm
oxygen and 94 atm of nitrogen gas.
Solution:
According to Daltons law of partial pressures, total pressure of the gaseous mixture is the
sum of the partial pressure
Question:
What is the total pressure of the gas mixture which is composed of 93 mmHg
oxygen, 565 mmHg of nitrogen, 38 mmHg carbon dioxide, 47 mmHg water vapor?
Solution:
According to Daltons law of partial pressures, total pressure of the gaseous mixture
Question:
Calculate the volume occupied by 0.420 moles of helium gas STP conditions?
Solution:
Number of moles of the helium
Volume occupied by 1 mole of
He
gas is
0.420 mol He
.
gas at STP is 22.4 L.
He
Relationship obtained from the molar volume:
1 mo
Question:
Calculate the no of moles of 44.8 L of oxygen gas at STP conditions?
Solution:
Volume of the oxygen
O2
gas is 44.8 L.
Volume occupied by 1 mole of
gas at STP is 22.4 L.
O2
Relationship obtained from the molar volume:
1 mol O 2 22.4 L
Multiply
Question:
What is the mass of the 4.00 L of carbon dioxide gas at 32oC and 20 mmHg?
Solution:
Pressure
Volume
P
V
of the
of the
CO 2
CO 2
gas is
gas is
20. mmHg
.
4.00 L
Temperature,
T 32 o C + 273 = 305 K
Ideal gas constant
is
.
R 62.4 L.atm
K mol
Acc
Question:
What is the volume of the 2400 g of oxygen gas at 28oC and 3.0 atm?
Solution:
Mass of oxygen
O2
is
2400 g
.
Molar mass of oxygen is
.
32.00 g/mol
Calculate the number of moles of oxygen by multiplying the mass of oxygen with the
conversion fac
Question:
How much ammonia id formed when 5 L of water reacts with nitrogen dioxide gas
at 375oC and 725 mmHg?
Solution:
Pressure
Volume
P
V
of the water vapor is
of the water vapor is
725 mmHg
.
5.00 L
Temperature,
T 375 o C + 273 = 648 K
Ideal gas con