Half-life and rate constant for a first-order reaction are related by the equation:

  • A
    $t_{1/2} = \frac{k}{0.693}$
  • B
    $k = \frac{[A]_0 - [A]_t}{t_{1/2}}$
  • C
    $t_{1/2} = \frac{0.693}{k}$
  • D
    $t_{1/2} = \frac{[A]_t - [A]_0}{k}$

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