Calculate the mass of propylene glycol \( \left(\mathrm{C}_{3} \mat...

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Calculate the mass of propylene glycol \( \left(\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}_{2}\right) \) that must be added to \( 0.54 \mathrm{Kg} \) of water to reduce its vapour pressure by 3 torr at \( 40^{\circ} \mathrm{C} \).
\( \mathrm{P} \)
[Given : Vapour pressure of water at \( 40^{\circ} \mathrm{C} \) is 25 torr]
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