Volatile solutes

Chemistry Level pending

At 20 20 °C, the vapor pressure of toluene is 0.0289 0.0289 atm and the vapor pressure of benzene is 1.34 1.34 atm. Suppose that 0.4 0.4 mol of toluene and 0.4 0.4 mol of benzene are mixed to form an ideal solution. What is the mole fraction of benzene in the vapor in equilibrium with this solution?

0.226 0.226 0.500 0.500 0.774 0.774 0.864 0.864

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