mass of CH3OH is X
no of moles of CH3OH n1 = X/32
mass of CH3-CH2-OH is X
no of moles of CH3-CH2-OH n2 = X/46
Total no of moles = n1+ n2
                      Â
= X/32+ X/46 = 46X+ 32X/1472
                    Â
= 78X/1472 = 0.053X
mole fraction of CH3OH = n1/n1+n2
                                 Â
= X/32/0.053X
                                Â
= 0.59
mole fraction of CH3OH+ mole fraction of CH3-CH2-OH = 1
mole fraction of CH3-CH2-OH = 1-0.59 = 0.41
