1.

34.2 g of cansugar is dissolved in 180 g of water. The relative lowering of vapour pressure will be

Answer»

<P>0.0099
1.597
0.84
0.9901

Solution :`(P_(1)^(@)-P)/P_(1)^(@)=(W_(2)//M_(2))/(W_(1)//M_(1)+W_(2)//M_(2))`
`=(34.2//342)/(34.2//342+180//18)=0.1/10.1=0.0099`


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