What is the rate expression for the given process

Question

Problem

Sulfur in the +4 oxidation state participates in a number of atmospheric reactions. S(IV) represents the total concentration in the+4 oxidation state: [S(IV)]=[SO₂]+[SO₂H₂O]+[HSO₃^-]. The second-order reaction of S(IV) with a component A is given by A + S(IV) → products.

(a) What is the rate expression for the process?

(b) Rewrite the above expression in terms of the partial pressures of the species.

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.