Question

The percentage by weight of hydrogen in $H_2O_2$ is

• A. 5.88
• B. 6.25
• C. 25
• D. 50

Answer 1

Answer: (A)

5.88

Answer 2

Mol. mass of $H_2O_2 = 2 \times 1 + 16 \times 2 = 34$ $\therefore$ Percentage of hydrogen = $\frac{2}{34} \times 100$ = 5.88%