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The vapor pressure of a solvent at 20oC is 17.5 Torr. The vapor pressure decreases by...

The vapor pressure of a solvent at 20oC is 17.5 Torr. The vapor pressure decreases by 0.62 Torr when 800 grams of this solvent is thrown out of some salt. According to this;

(A) The vapor pressure of the solution

(B) Mole fraction of solvent

(C) Calculate the molality of the salt (Mole weight of solvent = 18 g / mol)

(D) If the freezing point lowering of the solution is 0.66, find the cryoscopy constant of the solvent.

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