Solvents A and B form an ideal solution. Solvent A has a vapor pressure of 345 torr at room temperature. At the same temperature, solvent B has a vapor pressure of 213 torr. What is the vapor pressure of a mixture where the mole fraction of A is 0.285?
(A)213 torr (B)345 torr (C)568 torr (D)251 torr
D