Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO 3(g). 2 SO 2( g) + O 2( g) ⇌ 2 SO 3( g) K c = 1.7 × 10 8 [SO 2] eq = 0.0034 M [O 2] eq = 0.0018 M