Talk:AP Chemistry/Stoichometry

First of all in the old page, C2H2 is not an empirical formula, and the balanced chemical equation on the old page was not even close to being balanced properly. Secondly, this is a bad example because experimentally, you cannot magically come up with any number of moles of a substance if you do not know its molecular formula. I think that the introduction to the problem should be reworded so that it accounts for this, and the entire example may need to be changed.

Sure you know how many moles there were. If there were 89.6L of acetylene at STP, then four moles were burned.