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What is the molar mass of a compound if 517 mg of the compound in a 103 mL


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reaction vessel at 37.5 C exerts a pressure of 771 mmHg? ( The compound is in the gas phase)

Nov 24th, 2017
This problem can be formulated as below

using the relation PV=nRT, we can obtain the molar mass as below

P=771 mmHg, T=37.5C=310.5K, V=103mL=1 L, R=62.36L mmHg K−1   mol−1

n=PV/RT=771x1/(310.5x62.36)=0.0398 mol

Therefore the molar mass=517x10^-3/0.0398=13.0 g/mol

Best regards.

Dec 15th, 2014

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Nov 24th, 2017
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Nov 24th, 2017
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