Name: ________________
Date: _________________
Period: _______________
Directions: Solve the following problems. Show all work for full credit.
Mixed Gas Law Problems:
1) A sample of nitrogen gas kept in a container of volume 2.3 L and at a temperature
of 32 0C exerts a pressure 4.7 atm. Calculate the number of moles present.
2) Given 6.9 moles of carbon monoxide are gas are present in a container of volume
30.4L, what is the pressure of the gas (in atm) if the temperature is 62 0C
3) What volume will 5.6 moles of sulfur hexafluoride gas occupy if the temperature
and pressure of the gas are 128 0C and 9.4 atm
Gas Densities and Molar Mass:
1) At 741 torr and 44 0C, 7.10g of a gas occupy a volume of 5.40 L. What is the
molar mass of the gas
2) A 2.10-L vessel contains 4.65 g of a gas a 1.00 atm and 27.0 0C
a. Calculate the density of the gas in grams per liter
b. What is the molecular mass of the gas?
3) Calculate the density of hydrogen bromide gas in grams per liter at 733 mmHg
and 46 0C
Gas Stoichiometry Problems:
1) Methane, the principal component of natural gas, is used for heating and cooking.
The combustion process is: CH4(g) + 2O2(g)  CO2(g) + 2H2O(l)
a. If 15.0 moles of CH4 are reacted, what is the volume of CO2 (in liters)
produced at 23.0 0C and .985 atm?
2) In alcohol fermentation, yeast converts to glucose to ethanol and carbon dioxide:
C6H12O6(s)  2C2H5OH(l) + 2CO2(g)
a. If 5.97g of glucose are reacted and 1.44 L of CO2 gas are collected at 293 K
and .984 atm, what is the final volume?
3) If 85.0 g of potassium chlorate are reacted in a 2.50 L container and the oxygen is
cooled to 21 0C in the same container, what will the pressure of the oxygen be
The Reaction is: 2KClO3  2KCl + 3O2
Dalton’s Law
1) A mixture of gases contains .31 mol CH4, .25 mol C2H6, and .29 mol C3H8. The
total pressure is 1.50 atm. Calculate the partial pressures of the gases
2) A 2.5 L flask at 15 0C contains a mixture of N2, He, and Ne at partial pressures of
.32 atm for N2, .15 atm for He and .42 atm for Ne.
a. Calculate the total pressure of the mixture
b. Calculate the volume in liters at STP occupied by He and Ne if the N2 is
removed selectively
3) A mixture of gases contains 4.46 moles of neon, .74 moles of argon, and 2.15
moles of xenon. Calculate the partital pressures of the gases if the total pressure is
2.00 atm at a certain temperature