The decomposition of ammonia on a platinum surface at 856 °C NH3 1/2 N2 + 3/2 H2 is zero order in NH3 with a rate constant of 1.50×10-6 M s1. If the initial concentration of NH3 is 2.41×103 M, the concentration of NH3 will be M after 1.28x103 seconds have passed.

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