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A sample of an unknown gas with a mass of 4.67 goccupies a volume of 1.88...

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Chemistry

A sample of an unknown gas with a mass of 4.67 goccupies avolume of 1.88 L at a pressure of 785 mmHg and a temperature of20.0 ∘C. Molar mass=57.9 g/mol. If the unknown gas is composed of3.86 g of carbon and the rest is hydrogen, what is its molecularformula?

Answer & Explanation Solved by verified expert
4.4 Ratings (645 Votes)
Moles can be expressed as massmolar mass massMW So the ideal gas law become PV massMW RT Just plug in the values and solve for what you need and solve for MW P 785760 103 atm V given in the    See Answer
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