Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 LL; that is, rate and time are inversely proportional.)

Physical Chemistry
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ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter1: Gases And The Zeroth Law Of Thermodynamics
Section: Chapter Questions
Problem 1.21E: Pressures of gases in mixtures are referred to as partial pressures and are additive. 1.00 L of He...
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A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 120 ss for 1.0 LL of the gas to effuse. Under identical experimental conditions it required 33 ss for 1.0 LL of O2O2 gas to effuse.
 
 

Part A

Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 LL; that is, rate and time are inversely proportional.)
Express your answer using two significant figures.
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