Question

What is the weight of available oxygen from a solution of h2o2?

Answer 1

Hi,

In this case, you need to get the relative formula mass of hydrogen peroxide then you can work out the percentage mass of oxygen in hydrogen peroxide.

So the mass of H2O2 = 34 g/mol

then the composition of O2 = 32 g

Therefore % by mass = 32/34 x 100= 94.117% and this is what represents 32 g given above.