Use Collision Theory to Calculate an Estimate of the Arrhenius

Use collision theory to calculate an estimate of the Arrhenius pre-exponential factor for the reaction of two chlorine, ³⁵Cl, atoms at a temperature of 298 K. The collisional cross section of a chlorine atom is estimated to be 0.064 nm².

A) 33 *10⁶ mol^-1 m³ s^-1
B) 23*10⁶ mol^-1 m³ s^-1
C) 11 *10⁶ mol^-1 m³ s^-1
D) 17 *10⁶ mol^-1 m³ s^-1