What mass of ethene (M = 28 g/mol) is formed when 23 g of ethanol (M = 46 g/mol) is completely dehydrated?
Correct answer D. 14 g
Explanation
C₂H₅OH → C₂H₄ + H₂O in a 1:1 ratio. Moles of ethanol = 23/46 = 0.50 mol, so 0.50 mol ethene forms. Mass = 0.50 × 28 = 14 g.
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