The mass per cent of `H_2O_2` in '30 volume `H_2O_2` is

Options

A. `4.56%`
B. `9.11%`
C. `11.39%`
D. `13.67%`

Answer

B

Explanation

Strength of 30 volume `H_2O_2`=(molarity)(molar mass)= `{(2 xx 30//22.4)"mol L^(-1)}(34g mol^(-1))`
`= 91.1 g L^(-1)`
Mass per cent of `H_2O_2 = 9.11%`