Question

4 g of urea was dissolved in 36 g of h20.What is the mole fraction of urea in the solution

Answer 1

Answer:

Explanation:

Mole.Wt.of Urea =NH2-CO-NH2 = 60.

The Mole.Wt of water= H2O= 18

No of moles of Urea= 30/60= 0.5

No of moles of water= 180/18 = 10

Mole. Fraction of Urea= 0.5/(10+0.5) =0.5/10.5 =1/21= 0.04762

Mole. Fraction of water= 10/10.5 =20/21 = 0.95238