1.23 In a reaction
Identify the limiting reagent, if any, in the following reaction mixtures.
(i) 300 atoms of A + 200 molecules of B
Here according to the reaction 1 atom of A reacts with 1 molecule of B.
Therefore, 200 molecules of atoms of B will react with 200 atoms of A, thereby left with 100 atoms of A unreacted.
Hence, B is the limiting reagent in this reaction.