The total pressure observed by mixing two liquids A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively. The total pressure…

The total pressure observed by mixing two liquids A and B is $\displaystyle 350$ mm Hg when their mole fractions are $\displaystyle 0.7$ and $\displaystyle 0.3$ respectively. The total pressure becomes $\displaystyle 410$ mm Hg if the mole fractions are changed to $\displaystyle 0.2$ and $\displaystyle 0.8$ respectively for A and B . The vapour pressure of pure A is $\displaystyle \_\_\_\_$ mm Hg. (Nearest integer) Consider the liquids and solutions behave ideally.