This video started a good discussion over on my friends feed. So far no one has answered it and I dont want to give away the answer to anyone else (please CW your answers) but the question is this:
Why is it when you burn a piece of steel wool it gets heavier, but if you burn a log it gets lighter.
https://commons.wikimedia.org/wiki/File:Busch_Werke_v1_p_235.jpg
@tatzelbrumm
Yup thats the majority of the eeight. Only part you forgot is that water is also generated in the reaction and released as steam.