Density
1) Determine the molecular weight of a gas 4.50 g of it occupies 4.0 L at 950 torr and 182 o
C.
2) Calculate the molar mass of a gas if its density at 0.0800 atm and 400.0 K is 0.0391 g/L.
3) Assuming ideal gas behavior, what is the molecular weight of a gas with a density of 2.50 g/L at
98 o C and 0.974 atm?
4) At 100. o
C and 720 torr, what is the density of carbon dioxide?
Dalton’s Law of Partial Pressures
5) A mixture of gases contains 12.47 g of N
2
, 1.98 g of H
2
, and 8.15 g of NH
3
. If the total pressure of the mixture is 2.3 atm, what is the partial pressure of each compound?
6) A mixture of nitrogen and oxygen gas is collected by displacement of water at 30 o
C and 700. torr pressure. If the partial pressure of nitrogen is 550 torr, what is the partial pressure of oxygen?
7) What is the partial pressure of each gas in a mixture which contains 40. g He, 56 g N
2
, and 16 g
O
2
, if the total pressure of the mixture is 5.0 atmospheres.