NYSTCE Chemistry: 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. 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 2 2. 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 3 3. 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 4 4. What volume is occupied by 15.0 moles of carbon dioxide gas at standard temperature and pressure?

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. A bag of chips has a volume of 2.0 L at 760 torr of pressure. What is its volume in an airplane flying at a high altitude with a pressure of 550 torr?

Question 7 7. To use Gay-Lussac's Law, which of the following needs to remain constant?

Question 8 8. If you add a gas to a container with a fixed volume, what happens to the amount of pressure in that container?

Question 9 9. Which of the following variables is NOT included in the ideal gas equation?

Question 10 10. How does a higher temperature affect the probability distribution curve of gas particles?

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Question 11 11. If a gas with a pressure of 6 atmospheres is cooled from 500 K to 250 K, then what is its final pressure?

Question 12 12. What does it mean when a gas sinks?

Question 13 13. What is mass?

Question 14 14. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?

Question 15 15. Assuming the volume is held constant, what happens to the pressure of a gas when the absolute temperature doubles?

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Question 16 16. 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 17 17. If a 22.4 L container is holding 1.00 mole of a gas at 273 kelvins, then what is its pressure?

Question 18 18. Why are the van der Waals constants a and b different for each gas?

Question 19 19. 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 20 20. At constant pressure, what happens to the volume of a gas when the absolute temperature doubles?

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Question 21 21. 1000 mL of a gas is cooled from 500 K to 250 K. What is its final volume?

Question 22 22. Which of the following is TRUE about most gases?

Question 23 23. Which of the following statements best represents Graham's Law?

Question 24 24. Why does the volume of gas particles become important when the volume of the container is decreased?

Question 25 25. To use Boyle's Law, which of the following needs to remain constant?

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Question 26 26. What does the Maxwell-Boltzmann curve tell us?

Question 27 27. A 4 L sample of gas is heated from 20 K to 200 K. What will its final volume be?

Question 28 28. 1000 mL of a gas at 15 atm is compressed to 500 mL. What is its new pressure?

Question 29 29. If someone is measuring pressure, they might use any of the following units EXCEPT _____.

Question 30 30. Why can't all of the gas particles in a container have very high or very low speeds?

NYSTCE Chemistry: 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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