GKFix MCQ Question

For I₂(g) ⇌ 2I(g), with 40% I atoms by volume at 10⁵ Pa, what is the partial pressure of I₂?

• A. 0.4 × 10⁵ Pa
• B. 0.6 × 10⁵ Pa
• C. 0.2 × 10⁵ Pa
• D. 1.0 × 10⁵ Pa