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An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically. The reaction of compound A forming compound B was studied and the following data were collected: Time(s) - [A] (M): 0s - 0.184 M, 200s - 0.129 M, 500s - 0.069 M, 800s - 0.031 M, 1200s - 0.019 M, 1500s - 0.016 M What is the instantaneous rate of the reaction at t = 800s? Express your answer to two significant figures and include the appropriate units.