Problem: The gas phase decomposition of nitrogen dioxide at 383°C NO2 (g) → NO(g) + ½O2 (g) is second order in NO2 with a rate constant of 0.540 M-1s-1. If the initial concentration of NO2 is 0.361 M, the concentration of NO2 will be __________ M after 19.0 seconds have passed.

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The gas phase decomposition of nitrogen dioxide at 383°C 

NO2 (g) → NO(g) + ½O2 (g) 

is second order in NO2 with a rate constant of 0.540 M-1s-1

If the initial concentration of NO2 is 0.361 M, the concentration of NO2 will be __________ M after 19.0 seconds have passed.

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