An x molal solution of a compound in benzene has a molefraction =0.2.what is the value of x?
0.2 is the mole fraction of the solute in Benzene
Mole fraction of Benzene = 1-0.2 = 0.8
Molar mass of Benzene = 78 g/mol
Molality of solution = x
Molality can be found using the following formula:
m = (1000*x2) / (x1*M1)
x = (1000*0.2) / (0.8*78)
x = 3.205 moles/kg