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A solution containing 8 g of substances ...

A solution containing 8 g of substances in 100 g of diethyl ether bolis at `36.86^(@)C`, whereas pure ether boils at `35.60^(@)C`. Determine the molecular mass of the solute. (For ether `K_(b)2.02 K g "mol"^(-1))`

A

`1.01`

B

10

C

`10.1`

D

100

Text Solution

Verified by Experts

The correct Answer is:
D
`w=0.15 g, W = 15 g, Delta T_(b)=0.216^(@)C`
`K_(b)=2.16, m=?`
`m=(1000xxK_(b))/(Delta T_(b))xx(w)/(W)=(1000xx2.16xx0.15)/(0.216xx15)=100`
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