What is the mole fraction of ethanol in a solution made by dissolving 7.30 g of ethanol,C₂H₅OH,in 53.6 g of water? A)0.0505 B)0.0531 C)0.120 D)0.136

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Quizplus · Accepted Answer

The mole fraction of a component in a solution is calculated by dividing the moles of that component by the total moles of all components in the solution. First, calculate the moles of ethanol (C2H5OH, molar mass ≈ 46.07 g/mol) and water (H2O, molar mass ≈ 18.015 g/mol). Moles of ethanol = 7.30 g / 46.07 g/mol ≈ 0.158 mol. Moles of water = 53.6 g / 18.015 g/mol ≈ 2.975 mol. Total moles = 0.158 mol + 2.975 mol ≈ 3.133 mol. Mole fraction of ethanol = 0.158 mol / 3.133 mol ≈ 0.0505.

What Is the Mole Fraction of Ethanol in a Solution