The rate constant k, for the reaction ${\mathrm{N}}_2{\mathrm{O}}_5\left(\mathrm{g}\right)\to 2{\mathrm{NO}}_2\left(\mathrm{g}\right)+\frac{1}{2}{\mathrm{O}}_2\left(\mathrm{g}\right)\text{ is }2.3\times {10}^{-2}{\mathrm{s}}^{-1}$. Which equation given below describes the change of $\left[{\mathrm{N}}_2{\mathrm{O}}_5\right]$ with time? ${\left[{\mathrm{N}}_2{\mathrm{O}}_5\right]}_0$ and ${\left[{\mathrm{N}}_2{\mathrm{O}}_5\right]}_{\mathrm{t}}$ correspond to concentration of ${\mathrm{N}}_2{\mathrm{O}}_5$ initially and at time, t?

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