What is the molality of ethanol,C₂H₅OH,in an aqueous solution that is 37.4% ethanol by mass? A) 0.597 m B) 0.0130 m C) 13.0 m D) 0.719 m E) 93.0 m

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Quizplus · Accepted Answer

Molality is calculated as moles of solute per kilogram of solvent. Assuming 100 g of solution, 37.4 g is ethanol and 62.6 g is water. Moles of ethanol = 37.4 g / 46.08 g/mol = 0.812 moles. Mass of water = 62.6 g = 0.0626 kg. Molality = 0.812 moles / 0.0626 kg = 13.0 m.

What Is the Molality of Ethanol,C2H5OH,in an Aqueous Solution That

What Is the Molality of Ethanol,C₂H₅OH,in an Aqueous Solution That