Given that this chemiluminescent chemical reaction follows

Question

Ethene (C₂H₄) reacts with ozone (O₃) to form ethene ozonide (C₂H₄O₃) :

O₃ + C₂H₄ → C₂H₄O₃

In a university laboratory experiment the rate of disappearance of ozone (O₃) was measured to be 9 x 10^-3 M/s. Simultaneously, the concentration of ozone was measured to be 9 x 10^-5 M and the concentration of ethene 2.5 x 10^-7 M. Given that this chemiluminescent chemical reaction follows the following rate law:

Rate = K[O₃][C₂H₄]

Calculate the rate constant k.