krystalhurst97
09.07.2019 •
Chemistry
Asample of an unknown gas effuses in 12.1 min. an equal volume of h2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unknown gas?
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Ответ:
MW H2 = 2
MW 2 = ?
rate 1 = 1/12.1
rate 2 = 2.42
aopply graham law
Rate1/rate2 = sqrt(MW2/MW1)
(12.1/2.42)^2 = MW2/2
MW = 2(12.1/2.42)^2 = 50 g/mol
Therefore, the molar mass of the unknown gas is 50 g/mol
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