Okay so I have a question that has been bugging me, and it's basically why do compounds react together in a certain way when they could create different products and still be perfectly valence for example. 3H2O2 + 2Al = 2Al(OH)3 + H2 but it could also form H2O2 + Al = AlO2 + H2, *being that my balancing is correct, why is this? Why would it form Aluminum hydroxide over aluminum oxide?

Don't think the reaction would take place. Metals will probably catalyse peroxide reactions as H2O2 is unstable. You would most likely get O2 and H2O

If I remember my university chemistry right it is more a matter of energy, which reaction takes the least amount of energy to occur. One could take a large amount of energy and the other a low amount. Think about it:

The properly balanced: (No hydrogens here)
3H2O2 + 2Al = 2Al(OH)3
You're break three bonds and making three bonds.

If you scale it up so that you're using the same amount of materials.
3H2O2 +3Al = 3AlO2 + 3H2
You're breaking nine bonds and making nine bonds. (I think)

It is easier to do the above and it would require less energy.