6.8 gm of H₂O₂ is present in 500 ml of an aqueous solution. When 10ml of this solution is decomposed, what is the S.T.P. volume of oxygen obtained

M = 0.4M
volume strength = M x 11.2
                       = 0.4 x 11.2
                       = 4.48
4.48 volume strength of H₂O₂ means
1ml of H₂O₂ solution gives → 4.48ml of,O₂
10ml of H₂O₂ solution gives → ??ml  of O₂

Therefore 10ml, 4.48(W/V%) volume strength of H₂O₂ solution gives 44.8ml of O₂ at STP.