At T K, vapour pressures of H\(_2\)O and CH\(_3\)OH are 36 and 120 torr respectively. 72 g of H\(_2\)O and x g of CH\(_3\)OH when mixed, the resulting solution has a total vapour pressure of 64 torr. Find x.
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Always convert mass → moles first before applying Raoult’s law for mixed solutions.