text: stoichiometry? how many grams of water are required to produce 1.55 moles of c2h20? 1) set up the reaction equation 2 c + h2o -> c2h2o therefore 1 mol of water is needed to produce 1 mol of c2h2o  2) calculate the amount of water 1.55 mol = 1.55 x (16+ 2*1.01) = 27.9 gram