# Problem: Calculate the mole fraction of methanol in the vapor phase at 63.° C for an ideal solution containing 25.0 g of pure methanol (CH3OH, 32.0 g/mol) and 75.0 g of pure ethanol (CH3CH2OH, 46.1 g/mol)). The vapor pressure of methanol and ethanol at 63.5°C is 717.2 mmHg and 400.0 mmHg, respectively. a) 0.463b) 0.642c) 0.0925d) 0.163e) none of the above

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Calculate the mole fraction of methanol in the vapor phase at 63.° C for an ideal solution containing 25.0 g of pure methanol (CH3OH, 32.0 g/mol) and 75.0 g of pure ethanol (CH3CH2OH, 46.1 g/mol)). The vapor pressure of methanol and ethanol at 63.5°C is 717.2 mmHg and 400.0 mmHg, respectively.

a) 0.463

b) 0.642

c) 0.0925

d) 0.163

e) none of the above

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