Consider the elementary reaction of an organic molecule in an atmosphere at 25 C and 1 atm that contains a constant 0.16 ppt (ppt = 10-12) hydroxyl radical (OH) concentration. organic +.OH radical + H2O k Avogadro's number: 6.02x1023 Ideal gas law: PV=nRT where R= 82.06 cm atm mol-1 K-1 a) If the characteristic time defined as the time for 63% of the organic to react is 8 hours, what is the rate constant, k, in units of cm molecules 15-1? cm molecules-1 3-1 b) After 3 hours, how much organic reacts (express as a percentage)? % c) The radical formed by this reaction continues to react and, as a result, smog increases. Explain why smog increases in words