1.23 In a reaction
Identify the limiting reagent, if any, in the following reaction mixtures.
(iii) 100 atoms of A + 100 molecules of B
Here according to the reaction 1 atom of A reacts with 1 molecule of B.
Therefore, all 100 atoms of A will react with 100 molecules of B, so the reaction is stoichiometric and there is no limiting reagent.
Hence, there is no limiting reagent in this reaction.