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An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz ). Combustion of 4.50 g of...

An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz ). Combustion of 4.50 g of this compound produced 6.60 g of carbon dioxide and 2.70 g of water. If 4.50 g of the unknown compound contained 0.150 mol of C and 0.300 mol of H, how many moles of oxygen, O, were in the sample?

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