O 2/14/2017 11:00 PM A 25.9/100 2/2/2017 10:35 AM Gradebook Print Calculator Periodic Table Question 10 of 27 Map a Sapling Learning macmillan learning The rate constant for this first-order reaction is 0.500 s at 400 °C. A products How long (in seconds) would it take for the concentration of A to decrease from 0.890 M to 0.350 M? Number A6 Previous Give Up & View Solution Check Answer Next Exit Hint