The decomposition of NO2 is a second order reaction and the rate constant is 0.755 L/mol-s. In an experiment, the initial concentration of NO2 was 0.00650 mol/L. What is the concentration of NO2 after 125 s elapse? Select one: a. 0.00503M b. 0.00403 M c. 0.00603 M d. 0.00703M

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