hitunglah fraksi mol urea CO(NH2)2 dalam larutan urea 20℅ (Ar C= 12 O= 16 N= 14 H= 1)

massa urea = 20 gram
massa air = 80 gram
x urea = mol urea / jumlah mol seluruh
x urea = (20/60)/((20/60)+(80/18))
x urea = (0.3)/(0.3+4.4)
x urea = 0.063829787