Practice question
Question
What is the mole fraction of acetone (molar mass = 58 g/mol) in a solution containing 29 g of acetone and 54 g of water?
Explanation
Moles of acetone = (29/58) = 0.5 mol . Moles of water = (54/18) = 3 mol . Total moles = 0.5 + 3 = 3.5 . Mole fraction = (0.5/3.5) ≈ 0.143 .
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