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The vapor pressure of the solvent decreased by 10 mm Hg...

This question belongs to Chemical Engineering Stoichiometry
Stoichiometry
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The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?

Answer & Solution
Correct Answer: Option D
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