In a study of the decomposition of ammonia on a tungsten surface at 1100 °C NH31/2 N2 + 3/2 H2 the following data were obtained: [NH3], M 1.31×10-2 6.55×10-3 3.28×10-3 1.64×10-3 seconds 0 441 661 771 Hint: It is not necessary to graph these data. FILL IN THE BLANKS (1) The observed half life for this reaction when the starting concentration is 1.31×10-2 M is ________s and when the starting concentration is 6.55×10-3 M is ________s. (2) The average rate of disappearance of NH3 from t = 0 s to t = 441 s is ______M s-1. (3) The average rate of disappearance of NH3 from t = 441 s to t = 661 s is __________M s-1. (4) Based on these data, the rate constant for this _______ (zerofirstsecond) order reaction is _____M s-1.
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