Practice question
Question
What is the mole fraction of C₆H₁₂O₆ in a solution containing 18 g of C₆H₁₂O₆ and 72 g of H₂O? (Molar masses: C₆H₁₂O₆ = 180 g/mol, H₂O = 18 g/mol)
Explanation
Moles of C₆H₁₂O₆ = 18/180 = 0.1 mol; moles of H₂O = 4 mol. Total moles = 4.1. Mole fraction = 0.1/4.1 ≈ 0.0244.
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