Consider the Following Reaction: CuS(s) + O₂(g) ⇌ Cu(s)

Consider the following reaction: CuS(s) + O₂(g) ⇌ Cu(s) + SO₂(g)
A reaction mixture initially contains 2.9 mol L^-1 O₂. Determine the equilibrium concentration of O₂ if K_c for the reaction at this temperature is 1.5.

A) 1.9 mol L^-1
B) 1.7 mol L^-1
C) 2.2 mol L^-1
D) 1.2 mol L^-1
E) 0.59 mol L^-1