NameJ__________________

Practice Problems-5/3/02, 5/6/02

Score: _________/30

1. A gas occupies 15.5 dm³ at a pressure of 30 mm Hg. What is the volume when the pressure is increased to 50 mm Hg?

2. A gas occupies 9.25 L at a pressure of 0.75 atm. Determine the volume if the pressure is increased by 1.25 atm.

3. If a gas at 22° C occupies 2.5 dm³ at a pressure of 2.5 atm, what will be its volume at a pressure of 1 atm?

4. 500 ml of air is at 20.0° C is heated to 60°C. What is its new volume?

5. Given 300 ml of a gas at 15°C. What is its volume at 20°C?

6. If 15 liters of neon at 25°C is allowed to expand to 45 liters, what must the new temperatures be to maintain constant pressure?

7. A gas has a volume of 800 ml at minus 23°C and 300 mm Hg. What would the volume of the gas be at 227° C and 600 mm Hg? (combined gas law)

8. A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2 atm, 3 atm, and 4 atm respectively. What is the total pressure inside the container?

9. How many moles of gas are contained in 890 ml at 21° C and 750 mm Hg pressure?

10. Calculate the molecular weight of a gas if 25.44 g of the gas stored in a 5.5 liter tank exerts a pressure of 60 atm at a constant temperature of 35.5°C.