An aqueous solution of H₂O₂ is labeled as 33.6 vol. The amount of H₂O₂ present in 50ml of such an aqueous solution is

33.6 volume strength of H₂O₂ means

1 ml of  H₂O₂ solution $\stackrel{\mathrm{gives}}{\to }$33.6ml of O₂

5o ml of  H₂O₂ solution $\stackrel{\mathrm{gives}}{\to }$??? ml of O₂

$\frac{50\times 33.6}{1}$ $=$ 1680 ml of O₂

= 1680ml of O₂ liberated from 50ml of H₂O₂ solution

 $\underset{2 \mathrm{moles}}{{\mathrm{H}}_2{\mathrm{O}}_2}\to 2{\mathrm{H}}_2\mathrm{O}+\underset{1 \mathrm{mole}}{{\mathrm{O}}_2}$

2 x 34 gr of ${\mathrm{H}}_2{\mathrm{O}}_2$ solutions $=$22.4lit  (22400 ml)

 ???? gr of ${\mathrm{H}}_2{\mathrm{O}}_2$ solutions   $=$ 1680 ml