Complete combustion of 360 g of a hydrocarbon produced 111, Ask an Expert

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Complete combustion of 3.60 g of a hydrocarbon produced 11.1 g of co2 and 5.11 g of 520. What is the empirical formula for the hydrocarbon?
C?h?

and

A 85.2 g sample of the compound x4o10 contains 48.0 g of exygen atoms. What is the molar mass of element X?

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