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500 g of an arurea solution of mole traction 0.2 is diluted to 1500 g the mole fraction of solute in the diluted solution is

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500gm of urea solution of mole fraction 0.2 is diluted to 1500 gm. calculate the mole fraction of solute in the diluted solution

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tiwaavi

tiwaavi Genius

Mass of the Urea solution = 500 grams.

Molar mass of the Urea = 60 g/mole.

Mole Fraction of the Urea in a Original Solution = 0.2

This means that 0.2 mole of Urea is 1 mole solution.

∴ Mass of the Urea in a solution of 500 g = 0.2 × 60 g/mole.

= 12 g.

∴ Mass of the water = 500 - 12

= 488 g.