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1.0 g of non-electrolyte solute dissolve...

`1.0 g` of non-electrolyte solute dissolved in `50.0 g` of benzene lowered the freezing point of benzene by `0.40 K`. The freezing point depression constant of benzene is `5.12 kg mol^(-1)`. Find the molecular mass of the solute.

A

`206 g mol^(-1)`

B

`226 g mol^(-1)`

C

`246 g mol^(-1)`

D

`256 g mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaT_(f)=mK_(f)=(w)/(Mw)xx(1000)/(W_(A))xxK_(f)`
`Mw=(1)/(0.4)xx(1000)/(50)xx5.12=256`
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