What information do you get from the following chemical equations?

(a) Zn(s) + 2HCl (dil) ⟶ ZnCl₂ (aq) + H₂ (g)

(b) N₂(g) + 3H₂(g) $\xleftrightharpoons[\text{400-450°C 200-900 atm}]{\text{Fe (catalyst)/Mo (promoter)}}$ 2NH₃(g) + Heat

(a) We get the following information from the given chemical equation:

1. Zinc and Hydrochloric acid are reactants. Zinc is in solid state that reacts with dilute HCl.
2. The reaction is irreversible.
3. The products formed are an aqueous solution of zinc chloride and hydrogen gas.
4. The equation is balanced i.e., number of atoms of each element on the reactant side and the product side are equal.

(b) We get the following information from the given chemical equation:

1. The reactants, nitrogen and hydrogen, and the product, ammonia, are all gases.
2. The reaction is reversible and exothermic.
3. The reaction takes place at a temperature between 400-450°C and at a high pressure between 200-900 atmosphere.
4. The catalyst is iron and molybdenum acts as a promoter, which increases the efficiency of the catalyst.
5. The equation is balanced i.e., number of atoms of each element on the reactant side and the product side are equal.