5. Classification & Balancing of Chemical Reactions

Reaction of A (green spheres) with B (blue spheres) is shown in the following diagram:

Which equation best describes the reaction?

a. A₂ + 2 B → A₂B₂

b. 10 A + 5 B₂ → 5 A₂B₂

c. 2 A + B₂ → A₂B₂

d. 5 A + 5 B₂ → 5 A₂B₂

When sodium metal is placed in water, the following change occurs: Sodium, Na(s) + Water, H₂O(l) → Hydrogen, H₂(g) + Sodium hydroxide, NaOH(aq)

a. Identify the reactants and products and their physical states