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**Gas Laws Review Worksheet**

**Solve all problems – you must show your work (including units). Include the gas law and the correct answer**.

1)How many moles of chloroform, CHCl3, are required to fill a 0.253L flask at 100.0C and 940 mmHg?

a)Gas Law? ______

b)Answer? ______

2)You want the pressure inside a bottle to be 75.0 kPa at 23C. At what temperature in Celsius should you seal the bottle when the pressure is 78.0 kPa?

a)Gas Law? ______

b)Answer? ______

3)A diver’s lungs hold about 20.0 L of air underwater at a pressure of 875 mm Hg. Assuming he holds his breath and his lungs don’t burst, what will be the volume of air in his lungs at standard pressure on the water’s surface.

a)Gas Law? ______

b)Answer? ______

4)A soccer ball containing 12.0 L of gas at 21C is left outside on a cold, winter day. What is the temperature outside in Celsius if the ball shrunk to 10.5L ?

a)Gas Law? ______

b)Answer? ______

5)What pressure is required to compress a gas that occupies 6500 L at 25C and 1.0 atm to a volume of 40.0 L at 18C?

a)Gas Law? ______

b)Answer? ______

6)When a canning jar is sealed at 100C the pressure inside is 101.3 kPa. What is the pressure inside the jar when it cools to room temperature, about 21C?

a)Gas Law? ______

b)Answer? ______

7)A Marshmallow Peep® has a volume of about 45.0 cm3 at 101 kPa. What pressure is required to increase its size to 150.0 cm3 assuming no air escapes from the Peep®.

a)Gas Law? ______

b)Answer? ______

8)What is the temperature of a 0.00893 mol sample of neon gas that has a volume of 0.302 L and a pressure of 0.941 atm?

a)Gas Law? ______

b)Answer? ______

9)A gas occupies 4.78 L at 2.00 atm and 25C. What will the volume be at 0.975 atm and 15C?

a)Gas Law? ______

b)Answer? ______

10)A shampoo bottle contains 443 mL of air at 65C. What is its volume when it cools to 22C?

a)Gas Law? ______

b)Answer? ______

11)A balloon is filled with helium to a volume of 12.5 liters at 25C and 101 kPa. How many grams of helium are in the balloon?

a)Gas Law? ______

b)Answer? ______

12)A sample of propane has a volume of 250.0 L at 125 kPa and 38C. What volume will this sample have at 100.0 kPa and 95C?

a)Gas Law? ______

b)Answer? ______

13)The pressure in a can of hairspray is 2.50 atm at 298 K. What is the pressure in the can when it is heated to 398 K?

a)Gas Law? ______

b)Answer? ______

14)A 0.50-L canister of hazardous sarin gas was discovered at an old, abandoned military installation. To properly dispose of this gas, technicians must know how much gas is held in the canister. The gas pressure is measured as 10.0 atm at room temperature (25OC). How many moles of sarin are held inside the canister?

a)Gas Law? ______

b)Answer? ______

15)What volume of 2.0 mol H2(g) occupy at 40.0 OC and 0.50 atm pressure?

a)Gas Law? ______

b)Answer? ______

16)What mass of chlorine gas, Cl2, in grams, is contained in a 10.0 L tank at 27OC and 3.50 atm of pressure?

a)Gas Law? ______

b)Answer? ______

17)What is the volume of 77.0 g of nitrogen dioxide gas at STP?

a)Gas Law? ______

b)Answer? ______

18)At STP, what is the volume of 7.08 mol of nitrogen gas?

a)Gas Law? ______

b)Answer? ______