Answer :
[tex]Molecular\text{ }weight\text{ }of\text{ }H_2O_2=34.0gmol^{-1}[/tex]
Percent compositions:
[tex]\begin{gathered} Hydrogen:\frac{2}{34}\times100=5.9\% \\ \\ Oxygen:\frac{32}{34}\times100=94.1\% \end{gathered}[/tex]