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The vapour pressure of water at 20$^{\large\circ}$C is 17.54 mm. When 20g of a non-ionic, substance is dissolved in 100 g of water, the vapour pressure is lowered by 0.30 mm. What is the molecular weight of the substances?

1 Answer

206.88
Hence (B) is the correct answer.
answered Jun 17, 2014 by sreemathi.v
 

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