GKFix MCQ Question

What is the correct expression for Qc for the reaction 2CO2(g) ⇌ 2CO(g) + O2(g)?

• A. Qc = [CO2]^2 / ([CO]^2[O2])
• B. Qc = [CO]^2 / ([CO2]^2[O2])
• C. Qc = [O2] / ([CO2]^2[CO]^2)
• D. Qc = ([CO]^2[O2]) / [CO2]^2