Question

The first-order rate constant for the decomposition of $N_2{O}_5$ is $6.2\times {10}^{-4}{s}^{-1}$. The half-life for this decomposition is___?

• A. 11777.7 sec
• B. 1117.7 sec
• C. 6.077 sec
• D. 110.77 sec

Answer 1

Answer: (B)

1117.7 sec

For a first order reaction
$t_{\frac{1}{2}}=\frac{ln2}{k}=1117.7Sec$