For a first-order reaction, the relation between rate constant and hal…

Question

For a first-order reaction, the relation between rate constant and half-life is $t_{1/2} = 0.693/k$. If $k = 2.31 	imes 10^{-2}$ s⁻¹, then $t_{1/2}$ is approximately:

Accepted Answer

A. 30 s

$t_{1/2} = 0.693/(2.31	imes10^{-2}) \approx 30$ s. Independent of initial concentration — a signature of first-order kinetics.

Answer

100 s

Answer

10 s

Answer

300 s

For a first-order reaction, the relation between rate constant and half-life is $t_{1/2} = 0.693/k$. If $k = 2.31 \times 10^{-2}$ s⁻¹, then $t_{1/2}$ is approximately: