Posted by Katie on Friday, July 22, 2011 at 4:06pm.
how many moles of O2 is 25.1 liters (STP):answer: 25.1/22.4
2H2O>>2H2 + O2
so according to the balanced equation, you need 2*25.1/22.1 moles of water, convert that to grams.
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