CHEMISTRY I
Ideal Gas Law…w/s V
For the following problems include:
1. gas law used (name and formula)
2. set-up
3. answer with units
1. What pressure (in kPa) will be exerted by 0.362 moles of CH4 gas contained in a 8.91 liter vessel at 18.0°C?
98.2 kpa
2. How many moles of gas will a 486 mL flask hold at 10.0°C and 556 mmHg of pressure?
.015 moles
3. What volume will 6.40 mole of a gas occupy at 0.79 atm and 75.0°C?
231.18 L
4. What temperature will 2.75 moles of O2 stored in a 362 mL container at a pressure of 951 mmHg reach
2.01 K
5. What temperature must be maintained to insure that a 2.5 liter flask containing 0.10 moles of a gas will have
a pressure of 347 kPa?
1043.92 K
6. What pressure (in atm) will make 6.53 moles of gas fit into a 3.50 liter container at standard temperature?
41.77 atm
7. The temperature of 25 mL of gas is 25°C at a pressure of 780 mmHg. How many moles are in the sample?
.001 moles
8. What pressure in kPa will be exerted by 0.540 moles of a gas at 35.0°C if it is contained in a 750 mL vessel?
1842.83 kpa
9. 500.0 mL of Helium is stored at 40°C and 825 mmHg. How many moles are there?
47.31 moles
10. The temperature of 45.0 mL of gas is 36.0°C at a pressure of 0.82 atm. How many moles are there?
.001 moles
11. 1.38 moles of carbon monoxide occupy 715 mL at 112°C. What pressure (in mmHg) is being exerted by
the gas?
46308.55 mmHg
12. What volume would 22.8 grams of Methane (CH4) gas occupy at 82.0 kPa and 30.0°C?
43.6 L
13. How many molecules of Hydrogen gas is in a 34.0 liter container stored at 2.7 atm and 50.0°C?
2.09 x 1024 molecules
14. What is the mass of 0.62 liters of carbon dioxide gas being stored at 15.0°C and 680 mmHg?
1.03 g
15. A sample of a gas at STP has a mass of 0.179 grams and occupies 250 mL. What is the molar mass of this
compound?
16.02 g/mol
16. What is the density (g/mL) of a sample of Oxygen gas (O2) that exerts a pressure of 2240 mmHg inside a
5.0 liter container at 86°C?
.003g/ml
17. A tank containing 7000.0 grams of one of the diatomic gases (Br2, I2, N2, Cl2, H2, O2, F2) has leaked into a
5000.0 liter room at a temperature of 25°C. The resulting pressure is 1.22 atm. What is the identity of the
unknown gas?
28.04 g = N2
18. The density of carbon dioxide gas (CO2) in a 5.00liter container is 0.0462 g/mL. If the temperature inside
is 50.0°C, what is the resulting pressure in mmHg?
27.8 atm = 21,131.03 mmHg