posted by Songyi .
Given the chemical reaction:
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?
I tried to solve it..can someone verify if 50 total molecule is the correct answer?
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.
OOPS I can't add 10+20=30!