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Unformatted text preview: Version 001 HW27 gavrin (25111) 1 This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Serway CP 10 33 001 10.0 points A weather balloon is designed to expand to a maximum radius of 25 m when in flight at its working altitude where the air pressure is . 046 atm and the temperature is 192 K . If the balloon is filled at atmospheric pres- sure and 431 K , what is its radius at lift-off? Correct answer: m. Filled Balloon 002 (part 1 of 3) 10.0 points The molecular mass of helium is 4 g / mol, the Boltzmanns constant is 1 . 38066 10 23 J / K, the universal gas constant is 8 . 31451 J / K mol, and Avogadros number is 6 . 02214 10 23 1 / mol. Given: 1 atm = 101300 Pa. How many atoms of helium gas are required to fill a balloon to diameter 22 cm at 29 C and 1 . 187 atm?...
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- Spring '10