In the reaction, `A+B_(2) rarr AB_(2)`, identify the limiting reagent, if any, in the following mixtures
`{:("(i) 300 atoms of A"+"200 molecules of B","(ii) 2 mole A"+"3 mol B"),("(iii) 100 atoms of A"+"100 molecules of B","(iv) 5 mol A"+"2.5 mol B"):}`

Explanation

(i) According to the given reaction, 1 atom of A reacts with 1 molecule of B.
`therefore` 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be left unreacted. Hence, B is the limiting reagent while A is the excess reagent.
(ii) According to the given reaction, 1 mole of A react with 1 mole of B
`therefore` 2 moles of A will react with 2 moles of B. Hence, A is the limiting reactant.
(iii) No limiting reagent.
(iv) 2.5 moles of B will react with 2.5 moles of A. Hence, B is the limiting reagent.
(iv) 2.5 moles of A will react with 2.5 moles of A. Hence, B is the limiting reagent.
(v) 2.5 moles of A will react with 2.5 moles of B. Hence, A is the limiting reagent.