Practice question
Question
What is the mole fraction of H₂O in a solution containing 36 g of H₂O and 46 g of C₂H₅OH? (Molar masses: H₂O = 18 g/mol, C₂H₅OH = 46 g/mol)
Explanation
Moles of H₂O = 2 mol; moles of C₂H₅OH = 1 mol. Total moles = 3. Mole fraction = 2/3 ≈ 0.667.
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