83. Studying the reaction of thermal decomposition in the gas phase 2N2O5 → 2N2O4 O2 made it possible to obtain the dependence of the current concentration of N2O5 on time:
t, min 0 1 2 3 4 5
[N2O5], M 1.000 0.705 0.497 0.349 0.246 0.173
Find the order of the reaction, calculate the rate constant and half-conversion time.

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