Question

what is the percent composition of h and o in H2O2

Answer 1

$Molecular\text{ }weight\text{ }of\text{ }H_2O_2=34.0gmol^{-1}$

Percent compositions:

$\begin{gathered} Hydrogen:\frac{2}{34}\times100=5.9\% \\ \\ Oxygen:\frac{32}{34}\times100=94.1\% \end{gathered}$