Chemistry Exam 4

Chemistry Exam 4 - Kayla Thomas Chemistry 1201 Exam 4...

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Kayla Thomas Chemistry 1201 Exam 4 Review Si Session 1. A sample of gas at 1 atm is expanded at a constant temperature from 10L to 15L. What is the final pressure? 2. What is the approximate rms speed of methane at STP conditions? 3. A sample of methane gas occupies 57.9 L at 300K and 1 atm. What is the volume of this sample at 423 K and 2 atm? 4. What is the mole fraction of CO 2 gas in a sample of air, which consists of 0.756 mol N 2 , 0.189 mol O 2 , and 0.0132 mol of CO 2 ? 5. Methane effuses about 2.4 times faster than a certain know gas. Which of the following would you suspect of being the unknown gas? O 2 , C 2 H 6 , CH 3 Br, CH 3 ,I 6. The air bags in cars are inflated when a collision triggers the highly exothermic decomposition of sodium azide NaN 3 : 2NaN 3 (s) 2Na (s) + 3N 2 (g). A typical driver side airbag contains about 50 g of NaN 3 . Determine the volume of N 2 gas produced by the decomposition of 50 g of sodium azide at 85 C and 1 atm. 7.
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Chemistry Exam 4 - Kayla Thomas Chemistry 1201 Exam 4...

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