If you start with 0.05 m o3 and 0.01 m no and the reaction reaches completion in 16 seconds, what is the initial rate of this reaction with respect to o3?

Since we are basing the rate with respect to O3, therefore the rate would simply be the concentration divided by the total reaction time. That is:

rate of reaction = 0.05 M / 16 seconds

rate of reaction = 3.125 x 10^-3 M / second

or

rate of reaction = 0.003125 M / second

While oxygen is in use, following precautions must be taken:

All smoking materials, lighters and matches must be removed.  

Electrical operated equipment must be avoided.

Any flammable liquid must not be used

Static electricity must be avoided

No smoking sign must be there