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An aqueous solution of 2% nonvolatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molar mass of the solute when \(P^°_A\) is 1.013 bar?

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In a 2% solution weight of the solute is 2g and solvent is 98g 

ΔP = \(P^°_A\) – Psolution = 1.013 – 1.004 bar = 0.009 bar

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