The decomposition of gaseous dinitrogen tetraoxide (N2O5) to nitrogen dioxide and oxygen gases is a first order process with a rate constant of 0.0394 s-1 at a certain temperature. If the initial concentration of N2O5 (g) is 0.853 M, how long (in seconds) will it take for the concentration to reach 0.187 M? (answer in 3 signicicant figures )

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