Exam 2- - View Attempt

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View Attempt 1 of 1 Title: Midterm_Exam_2 Started: March 31, 2009 5:32 PM Submitted: March 31, 2009 6:37 PM Time spent: 01:05:21 Total score: 9/20 = 45% Total score adjusted by 0.0 Maximum possible score: 20 1. A sample of carbon dioxide gas at 125 °C and 248 torr occupies a volume of 275 L. What will the gas pressure be if the volume is increased to 321 L at 125 °C? Student Response Correct Answer a. 212 torr b. 356 torr c. 441 torr d. 379 torr e. 248 torr Score: 1/1 2. A gas sample occupies 12.0 liters at 30 o C and 1.0 atm pressure. Calculate the new volume of gas when the temperature is halved to 15.0 o C and the pressure is doubled to 2.0 atm pressure. Student Response Correct Answer a. 6.0 L b. 12.0 L c. 3.0 L d. 5.7 L e. 6.4 L Score: 1/1 3. A 0.260g sample of pure gas is found to occupy a volume of 0.115 L at a pressure of 600 torr and a temperature of 300 °C. What is the molar mass of this compound? View Attempt https://scholar.uh.edu/webct/urw/lc251595112.tp251595231/Vie. .. 1 of 9 6/16/2009 2:02 PM UnRegistered
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Student Response Correct Answer a. 135 g/mol b. 17.9 g/mol c. 70.5 g/mol d. 260 g/mol e. 157 g/mol Score: 1/1 4. Which of the following gases has the greatest density at a temperature of 30 °C and a pressure of 750 torr? Student Response Correct Answer a. methane b. ammonia c. carbon dioxide d. sulfur dioxide Score: 1/1 5. Which of the following is not true of an ideal gas? Student Response Correct Answer a. The average kinetic energy of a gas particle is proportional to the temperature in Kelvins. b. The volume of the gas particles is negligible compared to the volume of its container. c. All collisions are perfectly elastic.
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Exam 2- - View Attempt

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