How do I balance this

Fe3+ + H2O2 = Fe3+ +H2O +O2

Thanks! :p

Oh come on, this one is really easy!

You need to make sure you have the same number of O on each side first, then look at the hydrogen. You don't need to worry about the Fe ion.

As Capuchin said, you need not worry about balancing the iron because whenever you see Fe3+, it means that there is only one of those ions. Just thought I'd clarify that for you in case you were wondering.