How many moles of H2O2 are required to react with 8moles of H2O2

depends on the reaction equation.

In any case, I think H2O2 does not react with H2O2

Another confusing question. Typo perhaps.

Could you posibly mean

2H2O2 ==> 2H2O + O2
So it will require 8 mols H2O2 to react with the other 8 mols H2O2.

To determine how many moles of H2O2 are required to react with 8 moles of H2O2, we first need to know the balanced chemical equation for the reaction in which H2O2 participates. Once we have the balanced equation, we can use the stoichiometric coefficients to determine the mole ratio between the reactant (H2O2) and product (in this case, also H2O2).

Let's assume the balanced chemical equation for the reaction is:
2 H2O2 → 2 H2O + O2

According to the balanced equation, for every 2 moles of H2O2, we get 2 moles of H2O2 as a product. This means that the mole ratio between H2O2 (reactant) and H2O2 (product) is 2:2, or simply 1:1.

Since the mole ratio is 1:1, we can conclude that 8 moles of H2O2 would react with 8 moles of H2O2.

Therefore, 8 moles of H2O2 are required to react with 8 moles of H2O2.