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Question

The vapor pressure of pure water is 24 mm Hg at a certain temperature. What is the vapor pressure of a solution with a solute mole fraction of 0.25?

Options

Choose one · Correct answer highlighted

Explanation

Mole fraction of water = 1 - 0.25 = 0.75 . Vapor pressure = 24 × 0.75 = 18 mm Hg .