Question

a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of water. Assuming an excess of oxygen, what is the empirical formula of the hydrocarbon?
i just need to add that i need to know how to set up the problem not just the answer

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Sorry to bother again. I'm stuck in these two problems as well. 1. A 27.0 g smaple of an unknown hy... a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of... 104 ml of ethene, C2H4 is burned in 408 ml of oxygen, producing carbon dioxide and some liquid water...