Question- At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590. What is the mole fraction of toluene in the solution?
NOT: 0.213
The correct answer is 0.641. How do you get there?
If possible just a brief explanation how you got the answer?