At 298 ~K , the vapour pressure of pure water is 25 torr. The vapour pressure of water, when 12 ~g of urea (molar mass, 60 ~g ~mol ⁻¹ ) and 36 ~g of glucose (molar mass, 180 ~g mol ⁻¹ ) is dissolved in 100 ~g of water at the sametemperature

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At 298 ~K , the vapour pressure of pure water is 25 torr. The vapour pressure of water, when 12 ~g of urea (molar mass, 60 ~g ~mol ⁻¹ ) and 36 ~g of glucose (molar mass, 180 ~g mol ⁻¹ ) is dissolved in 100 ~g of water at the sametemperature (in torr) is

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Correct answer: D. 23.32

P _ H ₂ O ^ =25 torr; n _ u =12 / 60=0.2 moles; aligned & n _ g =36 / 180=0.2 moles; n _ H ₂ O =100 / 18=5.55 moles & _ H ₂ O = 5.55 5.55+0.2+0.2 = 5.55 5.95 & P _ H ₂ O = _ H ₂ O P ^ _ H ₂ O = 5.55 5.95 25=23.32 aligned

At 298 ~K , the vapour pressure of pure water is 25 torr. The vapour pressure of water, when 12 ~g of urea (molar mass, 60 ~g ~mol ⁻¹ ) and 36 ~g of glucose (molar mass, 180 ~g mol ⁻¹ ) is dissolved in 100 ~g of water at the sametemperature (in torr) is

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