# HW-8 - Rahman Tarique Homework 8 Due midnight Inst...

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Rahman, Tarique – Homework 8 – Due: Oct 31 2007, midnight – Inst: Vandenbout 1 This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 2 . 9 L at STP and the temperature of the water remains the same, what is the volume 57 . 19 m below the water’s surface? Answer in units of L. 002 (part 1 of 1) 10 points A gas is enclosed in a 10.0 L tank at 1200 mm Hg pressure. Which of the following is a reasonable value for the pressure when the gas is pumped into a 5.00 L vessel? 1. 600 mm Hg 2. 2400 mm Hg 3. 24 mm Hg 4. 0.042 mm Hg 003 (part 1 of 1) 10 points At standard temperature, a gas has a volume of 290 mL. The temperature is then increased to 138 C, and the pressure is held constant. What is the new volume? Answer in units of mL. 004 (part 1 of 1) 10 points A sample of gas in a closed container at a temperature of 67 C and a pressure of 6 atm is heated to 314 C. What pressure does the gas exert at the higher temperature? Answer in units of atm. 005 (part 1 of 1) 10 points A gas at 1 . 62 × 10 6 Pa and 26 C occu- pies a volume of 399 cm 3 . At what tem- perature would the gas occupy 542 cm 3 at 3 . 38 × 10 6 Pa? Answer in units of C. 006 (part 1 of 1) 10 points A sample of ideal gas occupies 250 mL at 25 C and 740 torr. What is its volume at STP? 1. 223 mL 2. 280 mL 3. 250 mL 4. 266 mL 5. 235 mL 007 (part 1 of 1) 10 points What is the percent yield if 4.51 moles of CH 4 produces 16 L of CO 2 at STP? CH 4 + 2 O 2 CO 2 + 2 H 2 O 1. 36.4% 2. 6.31% 3. 15.8% 4. 78.1% 5. 1.26% 008 (part 1 of 1) 10 points If I have 44.8 liters of nitrogen gas at standard temperature and pressure, how much will it weigh?

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