[lovegood]

Hi all, I need some help with regards to the question below. I'm not exactly sure how to go about solving it. Thanks in advance!

Perform a steady state analysis for d[Cl]/dt and for d[ClO]/dt in the following four step mechanism:

Cl2 --> 2Cl
Cl + O3 --> ClO + O2
2ClO --> 2Cl + O2
ClO + NO2 --> ClONO2
Mark the species that are free radicals.
Assume that the above reactions are elementary and obtain expressions for the steady state concentrations of Cl and ClO and hence for the rate of destruction of ozone.

[DevaDevil]

Mark the species that are free radicals.

any idea which ones they may be? Think of which species have unpaired electrons.