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Save and Submit Question 1 Question 1 In Gay-Lussac's law, the pressure of a gas increases due to an increase in temperature because Answer there is a decrease in the volume of the container. the molecules strike the walls of the container less often. the molecules strike the walls of the container more often. the molecules get bigger. there is an increase in the number of gas particles. Question 2 Question 2 According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because Answer a gas is composed of very small particles. gas particles move rapidly. gas particles do not attract or repel one another. the particles of a gas are very far apart. gas particles move faster when the temperature increases. Question 3 Question 3 A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg? Answer 1.50 mm Hg 7.5 mm Hg 760 mm Hg 507 mm Hg 1140 mm Hg Question 4 Question 4 Complete the following statement: In Charles' law, the volume of a gas _____ when the _____ decreases. Answer increases, pressure decreases, temperature increases, temperature decreases, pressure increases, quantity of gas Question 5 Question 5 A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from 25°C to 35°C. What was its new volume? Answer 4.84 L 7.00 L 3.57 L 5.17 L 4380 L Question 6 Question 6 According to Avogrado's law, Answer the volume of a gas is inversely related to the number of moles at standard temperature and pressure. the volume of a gas is inversely related to the number of moles at constant temperature and pressure. the volume of a gas depends only on the number of moles in the sample. the volume of a gas depends only on the temperature and pressure. the volume of a gas is directly related to the number of moles at constant temperature and pressure. Question 7 Question 7 A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0°C. During the summer, the temperature in the storage area reached 40.0°C. What was the pressure in the gas tank then? Answer 5.63 atm 4.44 atm 0.625 atm 40.0 atm 69.5 atm Question 8 Question 8 A sample of argon at 300.°C and 50.0 atm pressure is cooled in the same container to a temperature of 0.°C. What is the new pressure? Answer 54.9 atm 45.5 atm 23.8 atm 105 atm 42.7 atm Question 9 Question 9 A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a temperature of 25°C. What was the new volume of the gas when the temperature was changed to 50°C and the new pressure was 760 torr? Answer 450 mL 400 mL 970 mL 530 mL 240 mL Question 10 Question 10 A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 330 mm Hg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the mixture in torr? Answer 330 torr 1.4 torr 430 torr 1100 torr 760 torr Question 11 Question 11 Which of the following is NOT a potential use for a hyperbaric chamber? Answer treatment for burns and infections treating a diver with the bends increasing the rate at which a broken bone heals counteracting carbon monoxide poisoning treating some cancers Question 12 Question 12 A balloon is filled with helium gas. For the following question(s), select the letter of the balloon diagram that corresponds to the given change in conditions. The temperature is changed from 50°C to -150°C at constant pressure. Answer B C A A and B B and C Question 13 Question 13 At 570. mm Hg and 25°C, a gas sample has a volume of 2270 mL. What is the final pressure (in mm Hg) at a volume of 1250 mL and a temperature of 175°C? Answer 690 mm Hg 7000 mm Hg 1560 mm Hg 470 mm Hg 210 mm Hg Question 14 Question 14 At STP conditions, 11 g of SO2 have a volume of Answer 3.8 L. 250 L. 0.0076 L. 22 L. 130 L. Question 15 Question 15 A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP? Answer 17 L 5.6 L 30. L 130 L 11 L uestion 16 Question 16 The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant? Answer 1170 mL 110 mL 210 mL 0.0047 mL 0.0095 mL Question 17 Question 17 The pressure exerted by a gas on its container is directly proportional to Answer the mass of the individual gas molecules. the Fahrenheit temperature of the gas. the centigrade temperature of the gas. the number of molecules of gas in the sample. the volume of the container. Question 18 Question 18 The total pressure in a mixture of gases is equal to the partial pressure(s) of Answer the gas with the highest molecular weight. the gas with the greatest number of moles. the gas with the smallest number of moles. all the gases added together. the gas that occupies the largest volume. Question 19 Question 19 A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K? Answer 1.1 atm 1.5 atm 2.1 atm 0.47 atm 0.94 atm Question 20 Question 20 Which of the following is NOT part of the kinetic theory of gases? Answer Gas particles do not attract or repel one another. There is very little empty space in a gas. A gas is composed of very small particles. Gas particles move rapidly. Gas particles move faster when the temperature increases. Question 21 Question 21 Which of the following correctly describes the partial pressures of gases in the body? Answer high O2, high CO2, oxygenated blood high O2, low CO2, deoxygenated blood high O2, high CO2, tissue high O2, low CO2, oxygenated blood low O2, low CO2, deoxygenated blood Question 22 Question 22 A tank contains helium gas at 490 mm Hg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm? Answer 0.55 atm 1.5 atm 1.0 x 103 atm 2.1 atm 1600 atm Question 23 Question 23 The pressure of 5.0 L of gas increases from 1.50 atm to 1240 mm Hg. What is the final volume of the gas, assuming constant temperature? Answer 5.0 L 0.0060 L 5.4 L 4100 L 4.6 L Question 24 Question 24 The unit of 1 atmosphere used to describe the pressure of a gas is equal to Answer 760 mm Hg. 200 mm Hg. 600 mm Hg. 100 mm Hg. 1 mm Hg . Question 25 Question 25 At STP, temperature and pressure have the values of Answer 760 K and 273 atm. 273 K and 760 mm Hg. 0 K and 1 atm. 273 K and 1 mm Hg. 0 K and 760 mm Hg.
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