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The reaction A - B is carried out in a laboratory reactor. The concentration CA is a function of time according to the formula: CA = CAO exp(-kt) where Cao is the initial concentration of A in the reactor and k is a constant. (a) Find CA and k (b) Calculate CA at 1 = 240 s (min) 1.0 2.0 3.0 Ca(lb-mole/ft?) 0.84 0.56 0.38 NOTE: ALL CALCULATIONS HAND WRITTEN