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In the reaction H2O2(aq) H2O(l) + ½O2(g), the initial concentration of H2O2 is 0.2546 M, and the initial rate of reaction is 9.32×104 M s1. What will be [H2O2] at t = 35 s?
Use the definition of rate (change in concentration over change in time), recognizing that the initial rate for the loss of hydrogen peroxide is negative and at t = 0 s, [H2O2] = 0.2546 M.
[H2O2] = 0.2220 M