volume strength of 1.5 N H_{2}O_{2} solution is? and how plz give proper explanation

Volume strength (or volume percent) is an outdated term referring to the volume of oxygen gas liberated from one volume of H_{2} O_{2} solution (at 0oC and 1 atm.).

For example: If the volume strength is given as 20-volumes, it means that 1cm3 of H_{2} O_{2} will produce 20cm3 of oxygen gas.

2H_{2}O_{2} -----> 2H_{2}O + O_{2}

2 moles of H_{2}O_{2} -------> 22.4 L oxygen at STP .

Now

It is given that Normality of H_{2}O_{2} = 1.5 N

Moilarity of H_{2}O_{2} = 0.75 M ( n-factor for H_{2}O_{2} = 2 and N= nM)

So, in 1 L H_{2}O_{2} solution , there are 0.75 moles of H_{2}O_{2}

2 moles of H_{2}O_{2} give 22.4 L O_{2} at STP

So, 0.75 moles (1 L of the given H_{2}O_{2} soln) will give (22.4*0.75 / 2 ) L of Oxygen
Volume strength = 0.75*22.4 / 2 = 0.75*11.2 = 8.4 L