An effusion container is filled with 1 L of an unknown gas. It takes 123 s for the gas to effuse into a vacuum. From the same container under the same conditions--same temperature and initial pressure, it takes 369 s for 1.00 L of O₂ gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.

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Jamar FerryLv2

17 Dec 2019

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Options:
a) The molar mass is 287.3 g/mol.
b) The molar mass is 790.0 g/mol.
c) The molar mass is 63.0 g/mol.
d) The molar mass is 173.2 g/mol.
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