21. A proposed mechanism for the reaction of NO2 and CO is
Step 1: slow, endothermic 2 NO2(g) → NO(g) + NO3(g)
Step 2: fast, exothermic NO3(g) + CO(g) → NO2(g) + CO2(g)
Overall, exothermic NO2(g) + CO(g) → NO(g) + CO2(g)
a) What is (or are) the intermediates?
b) What is an experimental rate law consistent with this mechanism?