Tentukan fraksi mol urea dalam larutan urea 10%

Urea 10% dan air 90%
Urea = 10 gram
Air = 90 gram
Larutan = 100 gram

mol urea = 10/60 = 0,167 mol
mol air = 90/18= 5 mol

Fraksi mol urea

xt = mol ure / mol air + mol urea

0,167 / 5,167 = 0,032