GKFix MCQ Question

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

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