Question

What is the percent by mass of a solution containing 4. 0g of solute in 100g of water? (Percent by mass formula: (mass of solute/mass of solution) x 100) A 40 % B. 3. 8 % 26 % D. 2. 1 %

Answer 1

B
mass of solute - 4.0 g
mass of solution - 100g + 4.0g = 104g
4/104 = 0.03846
0.03846 • 100 = 3.8%