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Ethanol (molar mass = 46 g/mol) can be dehydrated to yield ethene (molar mass = 28 g/mol) by heating it with an excess of concentrated sulfuric acid (acting as a catalyst). CH3CH2OH → CH2=CH2 + H2O If 14.97 g of ethanol produced 6.38 g of ethene, the percentage yield of the product is: (Enter your answer to two significant figures.)