What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-x lene at 100°C, if their vapor pressures at ioo°C are 1340, 560 and 210 mmHg respectively?

5. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-x lene at 100°C, if their vapor pressures at ioo°C are 1340, 560 and 210 mmHg respectively?
o 756.2
o 780.5
o 8o1.5
o 880.5

Ans: B