On global scales O3 is produced in the troposphere by CO and mainly CH4 oxidation. Consider the following reactions for oxidation of CO and CH4 to CO2. We wish to write out net reactions for CO and CH4 oxidation, which means there should be no NOx in the net reaction. Oz CH4OH CH3O2 + H2O CH3O2 + NO CH3O+ NO2 (1) (2) CH3O+02HCHO + HO2 (3) CH3O2 + HO2 CH3OOH + O2 (4) CHOOH + OHHCHO+ OH + HO (5) Oz NO2+hv NO + 03 (6) HO+ NOOH + NO (7) HCHO + OH > CHO + H2O (8) CHO + 0, > CO + HOz (9) 02 COOH CO2 + HO2 (10) (a) Consider the case of NOx = 0. Write out the net reaction for the oxidation of CO to CO2 and a net reaction for the oxidation of CH4 to CO2. In this case, how many molecules of 03 are produced per molecule of CO oxidized and how many molecules of O3 are produced per molecule of CH4 oxidized by these reactions? (b) Now consider the high NOx case. Write out the net reaction for the oxidation of CO to CO2 and a net reaction for the oxidation of CH4 to CO2. In this case, how many molecules of 03 are produced per molecule of CO oxidized and how many molecules of O3 are produced per molecule of CH4 oxidized by these reactions? (c) If present global emissions for CO are 4 x10 moles/yr and for CH4 3 x 1013 moles/yr. Estimate the global production rate of 03 in the troposphere from your results above for the two cases, in moles/yr.