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Unformatted text preview: Marek, Erin – Homework 7 – Due: Oct 31 2007, 11:00 pm – Inst: Brodbelt 1 This printout should have 23 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Brodbelt CH301 Homework 7 Due October 31, 2007 at 11:00 PM 001 (part 1 of 1) 10 points The same number of grams of NH 3 and O 2 are placed in separate bulbs of equal vol ume and temperature under conditions when both gases behave ideally. Which statement is true? 1. The pressure in the NH 3 bulb is greater than the pressure in the O 2 bulb. 2. Both bulbs contain the same number of moles of gas. 3. The pressure in the O 2 bulb is greater than the pressure in the NH 3 bulb. 4. The pressures in the two bulbs are the same. 5. The bulb containing O 2 contains more molecules of gas. 002 (part 1 of 1) 10 points How many molecules are in 1.00 liter of O 2 gas at 56 ◦ C and 821 torr. 1. 32 molec 2. 2 . 24 × 10 23 molec 3. 4 . 00 × 10 2 molec 4. 1 . 83 × 10 25 molec 5. 2 . 41 × 10 22 molec 003 (part 1 of 1) 10 points At STP, 6.0 grams of CO gas will occupy a volume of 1. 2.24 liters. 2. 22.4 liters. 3. 5.6 liters. 4. 4.8 liters. 5. 3.5 liters. 004 (part 1 of 1) 10 points A flask contains 0.123 moles of an ideal gas that occupies 781 mL. A second flask at the same temperature contains 0.0712 moles of the same gas. The pressure is the same in both flasks. What is the volume of the second flask? 1. 452 mL 2. 1350 mL 3. 6.8 mL 4. 904 mL 5. 89,180 mL 005 (part 1 of 1) 10 points What is the volume of 0.500 moles of an ideal gas at 273 K and 760 torr?...
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 Fall '07
 Fakhreddine/Lyon
 Chemistry, Marek

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