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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 23.3 g of ethanol produced 12.5 g of ethene, the percentage yield of the product equals

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