GKFix MCQ Question

What is the number density of air molecules at STP as given in the text?

• A. 3.0×10²⁵ m⁻³
• B. 2.5×10²⁵ m⁻³
• C. 2.7×10²⁵ m⁻³
• D. 1.2×10²⁵ m⁻³