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What weight of glucose must be dissolved...

What weight of glucose must be dissolved in 100 g of water to lower the vapour pressure by 0.20 mm Hg ?
(Assume dilute solution is being formed)
Given : Vapour pressure of pure water is 54.2 mm Hg at room temperature. Molar mass of glucose is 180 `g mol^-1`

A

3.59 g

B

4.69 g

C

3.69 g

D

2.59 g

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