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# In a study of the decomposition of ammonia on a tungsten surface at 1100 °C NH31/2...

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 6.69×10-3 3.35×10-3 1.68×10-3 8.40×10-4 seconds 0 441 661 772 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 6.69×10-3 M is s and when the starting concentration is 3.35×10-3 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 order reaction is M s-1.

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