Question

A solution has been prepared by dissolving 5 g of urea in 95 g of water. What is the mass percentage of urea in the solution?

Options

• 4%

• 2%

• 5%

• 2.5%

Answer 1

5%

Explanation:

Mass percent (Mass %) = `"Mass of solute"/"Mass of solution" xx 100`

Mass of urea = 5 g, Mass of water = 95 g

Mass of solution = (5 + 95) = 100 g

Mass percent of urea = `((5  g))/((100  g)) xx 100` = 5%