alleryFor first-order reaction, half-life t₁/₂:
A0.693/k (independent of [A]₀)
B2k
C[A]₀/2k
Dk/2
Answer & Solution
Correct answer: A. 0.693/k (independent of [A]₀)
t₁/₂ = ln 2 / k = 0.693/k for 1st order.
**Crucial property:** half-life is independent of starting concentration.
Why radioactive decay has fixed half-life.
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