A sample of an unknown gas effuses in 12.6 min. An equal volume of N2 in the same apparatus at the same temperature and pressure effuses in 7.0 min. What is the molar mass of the unknown gas?
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Expert's answer
2019-10-17T07:30:15-0400
By using Graham law of diffusion or effusion:
t1t2=m1m2 ;
where t1 and t2 are the time required for effusion of gases and m1 and m2 are molecular mass of gases.
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