The first order rate constant for the decomposition of $N_2O_5$ is $6.2 \times 10^{-4} \ s^{-1}$. The half-life period for this decomposition in seconds is:
- A$1117.7$
- B$111.7$
- C$223.4$
- D$160.9$
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$(\log \, 4 = 0.60, \, \log \, 5 = 0.69)$
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