What is the molar mass of a gas

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Question - What is the molar mass of a gas when 50.0 g of the gas occupies 18.0 L at 125 C under 2.16 atm of pressure? If the gas in last question is 85.6% carbon and the remaining mass is hydrogen, what is the molecular formula of the gas?

I have read my textbook moreover I still don't understand so please provide me a very condensed, simple to know answer?

Reference no: EM13717145

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