GKFix MCQ Question

What is the correct expression for Qc for the reaction 2NH3(g) ⇌ N2(g) + 3H2(g)?

• A. Qc = [NH3]^2 / ([N2][H2]^3)
• B. Qc = [N2] / ([NH3]^2[H2]^3)
• C. Qc = [H2]^3 / ([NH3]^2[N2])
• D. Qc = ([N2][H2]^3) / [NH3]^2