Solutions

At 20\(^\circ\) C, the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The mole fraction of benzene in the vapour phase at 20\(^\circ\) above an equimolar mixture of benzene and methyl benzene is _____________ \(\times\) 10^\(-\)2. (Nearest integer)