Practice question
Question
What is the mole fraction of water in a solution containing 18 g of water and 46 g of ethanol (molar mass of ethanol = 46 g/mol)?
Explanation
Moles of water = (18/18) = 1 mol . Moles of ethanol = (46/46) = 1 mol . Total moles = 1 + 1 = 2. Mole fraction of water = (1/2) = 0.5 .
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