Q 1270380216.     Calculate the molecular weight of the compound. If addition of `0.643` g of that compound to `50` mL of benzene (density; `0.879` g/mL) lowers the freezing point from `5.51°` C to `5.03°` C. And `k_f` for benzene is `5.12`.

JEE-MIS
A

`M = 1.56` Kg/mol

B

`M = 1.56` g/mol

C

`M = 156` g/ mol

D

`M = 156` Kg/mol

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