Which of the following would be the limiting reagent in the reaction shown below? There are 50 molecules of O2 and 50 molecules of H2.

Question

2H2(g) + O2(g) ==> 2H2O(g)

Answer 1

WEll, you need 100 molecules H2 to react with 50 molecules of O2, so you must not have enough H2, and it is the limiting reactant.