A solution of \( 38.4 \mathrm{~g} \) of naphthalene in \( 185 \mathrm{~g} \) camphor depresses t...

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A solution of \( 38.4 \mathrm{~g} \) of naphthalene in \( 185 \mathrm{~g} \) camphor depresses the freezing point of the latter by \( 13.5 \mathrm{~K} \) while \( 11.6 \mathrm{~g} \) of another substance when dissolved in \( 185 \mathrm{~g} \) of camphor gives depression of \( 9.0 \mathrm{~K} \) in freezing point. The molecular mass of the second substance is
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