Question

Mole fraction of urea in its aqueous solution containing 10% urea (w/w) is​

Answer 1

Answer:

10/95

Explanation:

10% (w/w) urea implies that

weight of urea = 10gm

so, Mole of urea = 10/17mole

and

weight of water = 90gm

Mole of water. = 90/18 = 5mole

hence, mile fraction of urea = (10/17)/(5+10/17)

= 10/(85+10)

= 10/95