Answer:
first step
NO2(g) ------------------------------------> NO(g) + O(g)
second step
NO2(g) + O(g) -----------------------------> NO(g) + O2(g)
Explanation:
first step
NO2(g) ------------------------------------> NO(g) + O(g)
second step
NO2(g) + O(g) -----------------------------> NO(g) + O2(g)