Name:
1. The average atmospheric pressure at Walnut, California, is 740. mm Hg. Calculate this pressure in (a) torr and (b) atmospheres.
2. A barometer reads 1.12 atm. Calculate the corresponding pressure in (a) torr and (b) mm Hg.
3. What volume will 2.50 L of a gas occupy if the pressure is changed from 760. mmHg to 630. mm Hg?
4. A given mass of hydrogen occupies 40.0 L at 700. torr. What volume will it occupy at 5.00 atm pressure?
5. A gas occupies a volume of 200. mL at 400. torr pressure. To what pressure must the gas be subjected in order to change the volume to 75.0 mL?
6. A gas occupies a volume of 3.86 L at 0.750 atm. At what pressure will the volume be 4.86 L?
7. Three liters of hydrogen at -20 oC are allowed to warm to a room temperature of 27 oC. What is the volume at room temperature if the pressure remains constant?
8. If 20.0 L of oxygen are cooled from 100. oC to 0. oC, what is the new volume?
9. A 4.50 L container of nitrogen gas at 28.0 oC is heated to 56.0 oC. Assuming that the volume of the container can vary, what is the new volume of the gas?
10. The pressure of a container of helium is 650. torr at 25 oC. If the sealed container is cooled to 0. oC, what will the pressure be?
11. A gas cylinder contains 40.0 0L of gas at 45.0 oC anf has a pressure of 650. torr. What will the pressure be if the temperature is changed to 100. oC?
12. Given 20.0 L of ammonia gas at 5 oC and 730. torr, calculate the volume at 50. oC and 800. torr.
13. To what temperature (oC) must 10.0 L of nitrogen at 25 oC and 700. torr be heated in order to have a volume of 15.0 L and a pressure of 760. torr.
14. The volume of a gas-filled balloon is 50.0 L at 20. oC and 742 torr. What volume will it occupy at standard temperature and pressure (STP)?
15. 15.00 L of gas at 45.0 oC and 800. torr are heated to 400. oC and the pressure changed to 300. torr. What is the new volume?
16. To what temperature must 5.00 L of oxygen at 50. oC and 600. torr be heated in order to have a volume of 10.0 L and a pressure of 800. torr?
17. Determine the pressure of dry O2 collected by water displacement. The atmospheric pressure is 760. torr and the vapor pressure of water at the temperature the gas was collected was 21.2 torr.
18. Hydrogen gas was collected by the downward displacement of water. The gas was collected at 740.0 torr. The vapor pressure of water is 23.8 torr.
19. 10.25 mol of oxygen is collected at STP. What volume does it occupy?
20. 4.75 L of carbon dioxide is collected at STP. How many moles are present?
21. What pressure will be exerted by 0.400 mol of a gas in a 5.00 L container at 17 oC?
22. How many moles of oxygen gas are present in a 50.0 L tank at 22.0 oC if the pressure gauge reads 2000. lb/in2? (14.7 lb/in2 = 1 atm)
23. A 23.8 L cylinder contains oxygen gas at 20.0 oC and 732 torr. How many moles of oxygen are in the cylinder?
24. At 27 oC and 750 torr pressure, what will be the volume of 2.3 mol of Ne?
25. What is the Kelvin temperature of a system in which 4.50 mol of a gas occupy 0.250 L at 4.15 atm?