\( 1.00 \mathrm{gm} \) of a non-electrolyte solute dissolved in 50 \( \mathrm{gm} \) of benzene ...

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\( 1.00 \mathrm{gm} \) of a non-electrolyte solute dissolved in 50 \( \mathrm{gm} \) of benzene lowered the freezing point of benzene by \( 0.40 \mathrm{~K} \). \( \mathrm{K}_{\mathrm{f}} \) for benzene is \( 5.12 \mathrm{~K} \mathrm{~kg} \) \( \mathrm{mol}^{-1} \). Molecular mass of the solute will be:
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