Question

A solution of urea in water contains 16 grams of it in 120 grams of solurion. Find put the mass percentage of the solution

Answer 1

Mass of solute= 16 g
Mass of solution =120g

Mass % = mass of solute ÷
mass of solution × 100
= 16 ÷ 120 × 100
=13.333333333...%
= 13 % (approx)

Answer 2

Given: A solution of urea in water contains 16 grams of urea in 120 grams of the solution.

To find: Mass percentage of urea in the solution

Solution: Let the mass of urea in the solution be m and total mass of solution be M.

Here, m = 16 grams

M = 120 grams

For finding the mass percentage of the solution, the formula used is:

Mass percentage of urea

= (Mass of urea/Mass of solution) × 100

= (m/M)×100

= (16/120)×100

= 0.133 × 100

= 13.3%

Therefore, the mass percentage of urea in the solution is 13.3%.