Ok...I'm not entirely sure how to do decompostion equations (balancing) since i just learned it today but... Al2O3------> ? I think that the oxygen becomes an O2because it is a diatomic molecule. That I understand. Do I have to carry the Al2 over so that the factors end up being 3Al2 + O2.....the thing is...that wouldn't work with the beginning of the equation because the first Al would be 4 while the factors Al would be 6..when I say this i mean the final equation would be like......2Al2O3----> 3Al2 + O2 I hope that makes sense!! I need this for homework and that is how I figured the problem above...if someone could help me...that'd be amazing!!