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1.0 g of non - electrolyte solute dissol...

1.0 g of non - electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.4 K. Find the molar mass of the solute. [Given : Freezing point depression constant of benzene = 5.12 K. kg mol].

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`"Given "=w_(2)=1g" "DeltaT_(f)=0.4K" "w_(1)=50" "M_(2)=?`
`K_(f)="5.12K. Kg mol"^(-1)`
`M_(2)=(1000xxw_(2)xxk_(f))/(DeltaT_(f)xxw_(f))=(1000xx1.00xx5.12)/(0.4xx50)=256g//mol`
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