Posted by Thad on Thursday, January 31, 2013 at 2:41pm.
each mole of O2 requires 2 moles of H2.
How many moles of each reagent do you have?
For example, if you have 3 moles of H2 and 7 moles of O2, then the H2 will use 3/2 moles of O2, leaving extra O2 unused.
If you have 7 moles of H2 and 3 moles of O2, then all the O2 will be consumed by 6 moles of H2, leaving unused H2.
each mole of O2 produces 2 moles of H2O.
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