CHEMISTRY 11
DALTON'S LAW WORKSHEET
1. 2.00 g of H2 and 2.00 g of He are placed in a flask at 2.00 atmospheres pressure and 20.0 oC.
Find a) the moles of H2, b) the moles of He, c) the total moles, d) the partial pressure of H2 in
atm, e) the partial pressure of H2 in kPa, f) the partial pressure of He in kPa, g) the partial
pressure of He in mm Hg, h) the volume that would be required if the contents of the flask were
placed at STP (at STP 1 mole of gas occupies 22.4 L), i) the volume of the flask at the stated
conditions.
2. A gas mixture consists of 11.0 g of CO2, and 48.0 g of O2. The volume of the container is
22.4 L, the temperature is 273 K, and the pressure is 354 kPa. Determine a) the number of
moles of each gas, b) the total number of moles in the mixture, c) the mole fraction of each gas,
d) the partial pressure of each gas, e) the partial pressure of each gas at 500 oC in the same
container.
3. A mixture of gases consists of 1.00 g of oxygen, 2.00 g of nitrogen, and 0.500 g of carbon
dioxide. If the total pressure of the container is 750. mm Hg, what is the partial pressure of
each gas?
4. Three gases are mixed in a 3.00 L container and the total pressure is 102 kPa. There are
6.08 X 1020 molecules of A, 7.60 X 1019 molecules of B, and 5.0 X 1020 molecules of C. a)
What is the partial pressure of each gas, and b) what is the volume of each gas?
5. A mixture of gases is made by connecting a 7.50 L flask containing nitrogen at 2.00 atm to a
13.0 L flask containing hydrogen at 1.00 atm. a) what is the final volume of each gas, b) what
is the partial pressure of each gas, c) what is the total pressure of the mixture?
6. A 10.0 L flask contains 14.0 g of nitrogen and 88.0 g of carbon dioxide. Its total pressure is
754 kPa. The 10.0 L flask is attached to a 5.0 L flask which is totally empty. What is the
partial pressure of each gas when the flasks are connected?
7. A container is at STP. It contains 2.00 g each of nitrogen, oxygen, chlorine, and argon.
What is the partial pressure of each gas?
ANSWERS:
1a) 1.00 mol
b) 0.500 mol
c) 1.50 mol
d) 1.33 atm
e) 135 kPa
f) 67.5 kPa
g) 506 mm Hg
h) 33.6 L
i) 18.0 L
2a) 0.250 mol CO2
1.50 mol O2
b) 1.75 mol
c) 0.143 CO2
0.857 O2
d) 50.6 kPa CO2
303 kPa O2
e) 143 kPa CO2
858 kPa O2
3) O2 206 mm
N2 470. mm
CO2 74.7 mm
4a) A 52.4 kPa
B 6.55 kPa
C 43 kPa
b) 3.0 L
5a) 20.5 L
b) 0.732 atm N2
0.634 atm H2
c) 1.366 atm
6) 101 kPa N2
402 kPa CO2
7) N2 34.1 kPa
O2 29.8 kPa
Cl2 13.4 kPa
Ar 23.9 kPa