Question

Find the Limiting Reagent
A+B₂ gives AB_{2
If 100 atoms of A + 100 atoms of B
and If 2.5 mol and A and 5 mol of B}

Please Explain it ! I felt that tricky

Answer 1

1) According to the given reaction, 1 atom of A combines with 1 molecule of B. Thus, all 100 atoms of A will combine with all 100 molecules of B. Hence, the mixture is stoichiometric where no limiting reagent is present.

2) According to the reaction, 1 mol of atom A combines with 1 mol of molecule B. Thus, 2.5 mol of A will combine with only 2.5 mol of B and the remaining 2.5 mol of B will be left as such. Hence, A is the limiting reagent.