Holt McDougal Modern Chemistry Chapter 11: Gases Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Mark has unknowingly driven over a very large nail when exiting his work parking lot. He has a long commute home, and by the time he arrives he will have a flat tire. The air that is slowly escaping from the hole in his tire is an example of _____.

Question 2 2. 1000 mL of a gas at 15 atm is compressed to 500 mL. What is its new pressure?

Question 3 3. Hugo measures the pressure in his car's tire and finds that it is 32 Psi. What is the pressure if he converts this measurement from Psi to Torr?

Question 4 4. At constant pressure, what happens to the volume of a gas when the absolute temperature doubles?

Question 5 5. Oxygen is collected in a test tube over 30 degree Celsius water. The vapor pressure of the water at that temperature is about 32 mmHg. If the atmospheric pressure is 640 mmHg, then what percentage of the gas in the test tube is oxygen?

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Question 6 6. Which of these is the most common form of the ideal gas equation?

Question 7 7. If a 22.4 L container is holding 1.00 mole of a gas at 273 kelvins, then what is its pressure?

Question 8 8. The _____ states that gas particles are constantly moving in rapid, random movement.

Question 9 9. A sealed vessel contains 0.5 moles of oxygen, 0.1 moles of carbon dioxide, and 0.4 moles of nitrogen gas. The total pressure of the gas mixture is 5 atmospheres. What is the partial pressure of the carbon dioxide?

Question 10 10. A sample of an ideal gas is heated from 200 degrees Celsius to 400 degrees Celsius. If the initial pressure is 45 torr, then what is the final pressure?

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Question 11 11. A balloon has an initial volume of 150 mL at 25 degrees Celsius. If the temperature is increased to 75 degrees Celsius, what is the final volume?

Question 12 12. At constant temperature, what happens to the pressure when the volume is doubled?

Question 13 13. Assuming pressure and temperature are held constant, then what happens to the volume of a non-rigid container when the number of molecules in the container is doubled?

Question 14 14. A gaseous mixture contains 5.0 moles of nitrogen and 10.0 moles of helium. The total pressure in the container is 3 atmospheres. What is the partial pressure of the nitrogen?

Question 15 15. To use Charles' Law, which of the following needs to remain constant?

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Question 16 16. Which of the following actions would cause an individual to experience lower pressure as measured in Atmospheres?

Question 17 17. How do you calculate a and b in the van der Waals equation?

Question 18 18. In the van der Waals equation, what does a represent?

Question 19 19. In the ideal gas equation, what does R represent?

Question 20 20. If you know the temperature, volume, and pressure of a gas, how would you rearrange the ideal gas equation to find the number of moles?

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Question 21 21. Assuming the volume is held constant, what happens to the pressure of a gas when the absolute temperature doubles?

Question 22 22. If you add a gas to a container with a fixed volume, what happens to the amount of pressure in that container?

Question 23 23. Why do a and b get multiplied by n in the van der Waals equation?

Question 24 24. Which units of pressure are needed if you are going to use 0.0821 as your ideal gas constant?

Question 25 25. 1000 mL of a gas is cooled from 500 K to 250 K. What is its final volume?

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Question 26 26. A gas is collected by water displacement at 25 degrees Celsius. The vapor pressure of water at that temperature is 24 mmHg. If the atmospheric pressure is 800 mmHg, then what is the pressure of the dry gas you collected?

Question 27 27. To use Gay-Lussac's Law, which of the following needs to remain constant?

Question 28 28. If someone is measuring pressure, they might use any of the following units EXCEPT _____.

Question 29 29. To use Boyle's Law, which of the following needs to remain constant?

Question 30 30. If a gas with a pressure of 6 atmospheres is cooled from 500 K to 250 K, then what is its final pressure?

Holt McDougal Modern Chemistry Chapter 11: Gases Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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