Homework Help: Chemistry

Posted by Songyi on Friday, October 31, 2008 at 3:36am.

Given the chemical reaction:

N2+3H2--->2NH3

If 20 molecules of nitrogen react with 30 molecules of hydrogen to from ammonia, what is the total number of molecules present after the reaction goes to completion?

Chemistry - Songyi, Friday, October 31, 2008 at 4:16am
I tried to solve it..can someone verify if 50 total molecule is the correct answer?
Chemistry - Dr Russ, Friday, October 31, 2008 at 5:42am
The equation shows you that 1 molecule of nitrogen reacts with 3 molecules of hydrogen to produce 2 molecules of ammonia.
If you have 30 molecules of hydrogen, 10 molecules of nitrogen will react with it to produce 20 molecules of ammonia. Thus after the reaction has gone to completion there will be 20 molecules of ammonia PLUS 10 molecules of unreacted nitrogen giving a total of 40 molecules.
Chemistry - Dr Russ, Friday, October 31, 2008 at 5:42am
OOPS I can't add 10+20=30!
sorry!

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