10. The number of collisions a molecule makes per second is called collision frequency. At one atmosphere and 0 °C, estimate the collision frequency of air molecules. [The diameter of an air molecule under one atmosphere and 0 °C is approximately 3×10⁻¹⁰ (m), the average molecular speed is approximately 460 (m/s), and the molecular number density is approximately 2.7×10²⁵ molecules/m³].
(A) 3.5×10⁵ (collisions/s)
(B) 3.5×10⁷ (collisions/s)
(C) 3.5×10⁹ (collisions/s)
(D) 3.5×10¹¹ (collisions/s)