GKFix MCQ Question

What is the value of Kc for the reaction H₂(g) + Cl₂(g) ⇌ 2HCl(g) at 300K?

• A. 2.4 × 10⁴⁷
• B. 5.4 × 10¹⁸
• C. 4.0 × 10³¹
• D. None of the above