[Test tube]

ok the question is
 
DT=(RT_f²x_j)/DH_f

where x_j is the mole fraction, T_f is the freezing point of the pure solvent (cyclohexane), DH_f is its enthalpy of fusion, Dt is the magnitude of depression of freezing point.

i need to verify the equation DT=20.8Kkgmol^-1.n/W

where n is the number of moles of solute which are dissolved in W kg of cyclohexane.

dear god please help me.

[GCT]

ok the question is
 
DT=(RT_f²x_j)/DH_f

where x_j is the mole fraction, T_f is the freezing point of the pure solvent (cyclohexane), DH_f is its enthalpy of fusion, Dt is the magnitude of depression of freezing point.

i need to verify the equation DT=20.8Kkgmol^-1.n/W

where n is the number of moles of solute which are dissolved in W kg of cyclohexane.

dear god please help me.

I think you have the wrong formula for the first DT, after finding the correct form simply correlate this equation with the simple Kf*m