In a study of the decomposition of hydrogen iodide on a gold surface at 150 °CHI(g)½ H2(g) + ½ I2(g)the following data were obtained: [HI], M 0.573 0.287 0.144 7.20×10-2 seconds 0 520 781 912 Hint: It is not necessary to graph these data.(1)The observed half life for this reaction when the starting concentration is 0.573 M is s and when the starting concentration is 0.287 M is s.(2)The average rate of disappearance of HI from t = 0 s to t = 520 s is  M s-1.(3)The average rate of disappearance of HI from t = 520 s to t = 781 s is  M s-1.(4)Based on these data, the rate constant for this _______zerofirstsecond order reaction is M s-1.

The following data are for the decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C. H2₂O₂(aq) > H₂O(l) + 12 O₂(g) [H₂O₂], M time, min 7.34x10-2 0 3.67x10-2 8.68 Hint: It is not necessary to graph these data. (1) The half life observed for this reaction is (2) Based on these data, the rate constant for this 1.84x10-2 9.20x10-3 17.4 min. 26.0 order reaction is min -1

The activation energy of an uncatalyzed reaction is 86 kJ/mol. The addition of a catalyst lowers the activation energy to 61 kJ/mol Part A Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 24 °C? Express the ratio to two significant digits. ke/ku = 2.2 • 1o Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 128 °C? Express the ratio to two significant digits. ? ke/k, = 2.9 • 10² Submit Previous Answers Request Answer X Incorrect; Try Again; 8 attempts remaining

The rate constant for a given reaction is k = 0.312 M1s1. If the initial concentration of reactant is 1.00 M, the what is the length of the third half-life (in seconds)?