Question

A large balloon contains 11.7 grams of Helium. What volume will the helium occupy at an altitude of 10,000.meters, where the atmospheric pressure is 0.262 atm and the temperature is -50.0 °C? *

Answer 1

Answer:

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Answer 2

Explanation:

Given A large balloon contains 11.7 grams of Helium. What volume will the helium occupy at an altitude of 10,000 meters, where the atmospheric pressure is 0.262 atm and the temperature is -50.0  

• The molar mass of a substance is the number of grams per mole of that substance.
• So we have
• Atmospheric pressure P = 0.262 atm
• M = 4.0026 g/mol (since 10000 m moles helium = 4.0026 g/mol)
• T = - 50 + 273  
•   = 223 K
• Mass m = 11.7 g
• Universal gas constant R = 0.08206 L-atm / mol-K
• Now we have the equation V = mRT / PM
•                         = 11.7 g x 0.08206 L-atm / mol / K / 0.262 atm x 4.0026 g/mol
•                                              V = 204.16

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