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February 28, 2015

Homework Help: CHEM

Posted by Steph on Tuesday, July 22, 2008 at 1:40am.

The mass of an evacuated 255-mL flask is 143.187g. The mass of the flask filled with 267 torr of an unknown gas at 25 degrees Celsius is 143.289g. Calculate the molar mass of the unknown gas.

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