Question 1
The following diagram represents the reaction of A
2 (unshaded spheres) with B (shaded spheres). What is the balanced chemical equation for this reaction, and what is the limiting reactant?

◦ 2A
2 + B → A
4B; B is the limiting reactant.
◦ 4A
2 + 6B → 2A
4B; A
2 is the limiting reactant.
◦ 4A
2 + 6B → 2A
4B; B is the limiting reactant.
◦ 2A
2 + B → A
4B; A
2 is the limiting reactant.
Question 2
The following diagrams represent the reaction of A
2 (shaded spheres) with B
2 (unshaded spheres). Identify the limiting reactant and write a balanced equation for the reaction.

◦ B
2 is the limiting reactant; A
2 + 4 B
2 → 2 AB
4.◦ A
2 is the limiting reactant; A + 4 B → AB
4.
◦ A
2 is the limiting reactant; A
2 + 4 B
2 → 2 AB
4.
◦ B
2 is the limiting reactant; A + 4 B → AB
4.