What information do you get from the following chemical equations?

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

(b) N₂(g) + 3H₂(g) $\xleftrightharpoons[\text{400-500°C 200-900 atm}]{\text{Fe (catalyst)/Mo (promoter)}}$ 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 aqueous solution of zinc chloride and hydrogen gas.
4. The equation is balanced i.e., number of atoms of each element on reactants and products sides are equal.

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

1. The reactants nitrogen and hydrogen and the product ammonia all are gases.
2. The reaction is reversible and exothermic.
3. The reaction took place at a temperature between 400-500°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 reactants and products sides are equal.