How many moles of H2O2 are required to make 4 moles of water?

4 mol H2O2

Explanation:

First we need to write an equation that relates H2O2 to H2O (water)

H2O2 --> H2O + O2

Now we need to balance the equation so there's the same amount of atoms on each side. We can do this by adding a 2 in front of the H2O2 and H2O. So our balanced equation is now:

2 H2O2 --> 2 H2O + O2

Now, we do dimensional analysis to answer the question.

4 mol H2O * (2 mol H2O2)/(2 mol H2O) = 4 mol H2O2

yes it is balanced