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MHT CET Chemistry question

ChemistrySolutionsMHT CET

A small amount of a non-volatile solute is dissolved in of acetone (density: ). The vapour pressure of this solution at room temperature is 260 mm Hg, while that of acetone is 285 mm Hg. What is the molality of the solution?

Answer: (A)

Solution

Mass of acetone = 64.5 x 0.791 = 51.0 g = 0.879 mol;

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Question ID VK-061177