How do you write a chemical equation for Aqueous hydrochloric acid reacts with solid manganese (IV) oxide to form sulfur trioxide gas?

The chemical equation for this reaction is: 4HCl(aq) + MnO2(s) -> MnCl2(aq) + 2H2O(l) + Cl2(g) 2SO3(g)

Explanation: Hydrochloric acid (HCl) reacts with manganese (IV) oxide (MnO2) to form manganese chloride (MnCl2), water (H2O), chlorine gas (Cl2) and sulfur trioxide (SO3) gas.