Question

The reaction

2 SO2(g) + O2(g)<--> 2 SO3(g)
has an equilibrium expression. The mass action expression
forconcentration of oxygen has an exponent of ______.

Answer 1

The mass action expression for concentration of oxygen has an exponent of one.

Step-by-step explanation:

2 SO₂(g) + O₂(g) ⇄ 2 SO₃(g)

This is the expression for Kc:

Kc = [SO₃]² / [O₂] . [SO₂]²

The mass action expression has a totally relation with stoichiometry.