Calculate the weight of non-volatile solute having molecular weight 40 , which should be dissolv....

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Calculate the weight of non-volatile solute having
\( \mathrm{P} \)
molecular weight 40 , which should be dissolved in \( 57 \mathrm{~g} \) octane to reduce its vapour pressure to \( 80 \% \).
(1) \( 47.2 \mathrm{~g} \)
(2) \( 5 \mathrm{~g} \)
(3) \( 106.2 \mathrm{~g} \)
(4) None of these


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