Physics · Chemical Kinetics
A substance A decomposes following a first-order reaction sequence. Starting initially with [A] = 2.00 M, after 200 minutes the concentration becomes [A] = 0.15 M. Given log10(13.33) ≈ 1.125, the half-life period (t1/2) for this reaction is approximately:
- 143.2 minutes
- 248.5 minutes
- 350.5 minutes
- 453.5 minutes✓
Correct answer
53.5 minutes
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