Bettye Arre: Burning a piece of paper might be a good idea, but you have to consider that carbon dioxide and water vapor go off into the air and the ash is only what did not burn.If you burn an element, then the product will be the oxide of that element.2Mg +O2--->2MgOTo show conservation of mass with paper, you need to trap all the gases given off.Using methane, CH4, you can show that all is made into CO2 and H2OCH4+ 2O2--->CO2+2H2OThe paper would need to be burned in a Bell jar of a given volume....Show more
Clemente Schoeck: LOL..im not sure..but i reckon it would workweigh the piece of paper precisely, then burn it.the ash will be the only thing left...weigh the ash too, it will be heavier than the paper itself.the extra weight of the match comes from the Oxygen which has reacted with the paper..that's why the paper wouldn't burn without the presence of O2....Show more
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