In: Chemistry
2NO (g) + O2 (g) -> 2 NO2 (g)
if 12 moles of nitrogen monoxide are combined with 10 moles of
oxygen, how many moles of NO2 should form? I need step by step to
help with my test Please type if possible.
Well, we can say that the chemical equation is :
NO + O2 --> NO2
Given reaction is
2NO + O2 --> 2NO2
Given quantity of reactants 12 moles of NO
10 moles of O2.
limiting reagent (the one that we'll run out of first).
The stoichiometric ratios for NO:O2:NO2
are, from our equation, 2:1:2. Look at it this way:
For all 12 moles of NO to react, we'll need half as many in moles
of O2--that is, we'll need 6 moles of O2. Since we have more than 6
moles of O2, this means O2 is in excess, and NO is the limiting
reagent.
So we get that all 12 moles of NO will react with 6 of the moles of
O2 and produce 12 moles NO2. I'm not sure why your answer is
supposed to be 5, as it just isn't true.