The loss of atmospheric ozone has led to an ozone "hole" over Antarctica. The loss occurs in part through three consecutive steps: (1) Chlorine atoms react with ozone (O3) to form chlorine monoxide and molecular oxygen. (2) Chlorine monoxide forms ClOOCl. (3) ClOOCl absorbs sunlight and breaks into chlorine atome and molecular oxygen. (a)Write a balanced equation for each step. (b)Write an overall balanced equation for the sequence. We have to do this for our A.P Chemistry class. I dot know how to do this question. 

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a)

1. Chlorine atoms react with ozone (`O_3` ) to form chlorine monoxide and molecular oxygen.

`Cl +O_3 -> ClO + O_2`

2. Chlorine monoxide forms `ClOOCl` .

`2ClO harr Cl_2O_2`

This is an equilibrium reaction and both reactants and products can be found in the upper atmosphere.

3. `ClOOCl` absorbs sunlight and breaks into chlorine...

(The entire section contains 182 words.)

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