PRACTICE 3C - Chemistry 110 Name _ PRACTICE EXAM 3C Section...

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Chemistry 110 Name _______________________ PRACTICE EXAM 3C Section _______________________ Midterm 3 Signature _______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 28 questions on this exam. Check that you have done all of the problems and filled in the first 28 bubbles on the scantron. The maximum score on this exam is 28 points. Your score will be reported in percents (max 100%). Exam policy This cover sheet must be signed and handed in with your answer sheet for your exam to count. Calculators with text-programmable memory are not allowed. Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your grade will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (under "Exam Schedule"). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. Pay attention to units and magnitudes (decimal places) of numbers obtained from calculations. There is no penalty for guessing.
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CHEMISTRY 110 PRACTICE EXAM 3C -------------------------------------------------------------------------------- 1. The cylinder shown below is filled with enough N 2 gas at 25 o C to reach a volume of 0.100 L under 750 torr of atmospheric pressure. A mountaineer carries the cylinder to the top of Mt. Everest where the temperature and pressure are –30 o C and 210 torr. What is the final volume of N 2 gas in the cylinder atop the mountain? A. 0.027 L B. 0.137 L C. 0.235 L D. 0.291 L E. 0.358 L -------------------------------------------------------------------------------- 2. A sample of gas is placed in an open-ended Hg manometer as shown below. The difference in the height of the mercury between the two arms, h, is 27 mm. The external pressure is 600 torr. What is the pressure of the gas? A. 787 torr B. 627 torr C. 573 torr D. 760 torr E. 488 torr --------------------------------------------------------------------------------- gas Open end
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3. The mass of a flask with a 1.00 L volume that is evacuated to a pressure of 0.00 atm is found to be 92.01 g. After introduction of an unknown ideal gas with a pressure of 3.00 atm and temperature of 27 o C, the mass of the flask and gas are found to be 97.37 g. Identify the unknown gas. A. CO 2 B. N 2 C. Ne D. Kr E. Xe --------------------------------------------------------------------------------- 4. Which one of the following gases is most likely to deviate from the behavior of an ideal gas? A. O
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PRACTICE 3C - Chemistry 110 Name _ PRACTICE EXAM 3C Section...

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