Homework Help: Chemistry

Posted by Margaret on Friday, September 17, 2010 at 12:42am.

4NH3+5O2 = 4NO + 6 H20

If a container were to have 10 molecules of O2 and 10 molecules of NH3, initially, how many total molecules (reactants plus products) would be present in the container after this reaction goes to completion?

Chemistry - DrBob222, Friday, September 17, 2010 at 1:12am
When both reactants are given you know it is a limiting reagent problem.
10 molecules O2 x (4 moles NH3/5 moles O2)= 8 molecules NH3 needed and you have that much; therefore, oxygen is the limiting reagent but check it to make sure.
10 molecules NH3 x (5 moles O2/4 moles NH3) = 50/4 = 12.5 and you don't have that much oxygen; thus oxygen is the limiting reagent.
8 molecules NH3 will reagent with 10 molecules O2 to form 8 molecules NO. I will leave you with it. Use the coefficients to determine molecules H2O
Chemistry - macy, Monday, November 26, 2012 at 12:47am
38 molecules

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