A first-order reaction has k=0.53 min⁻¹. Find its half-life. Round the final result to 4 decimal places if needed. Answer in min.
Answer and explanation
1.3078 min
Set the remaining fraction exp(−kt) to 1/2 and solve t=ln 2/k.
Subjects
Chemical kinetics
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Sample exercises
A first-order reaction has k=0.13 min⁻¹. Find its half-life. Round the final result to 4 decimal places if needed. Answer in min.
Answer and explanation
5.3319 min
Set the remaining fraction exp(−kt) to 1/2 and solve t=ln 2/k.
A first-order reaction has k=0.29 min⁻¹. Find its half-life. Round the final result to 4 decimal places if needed. Answer in min.
Answer and explanation
2.3902 min
Set the remaining fraction exp(−kt) to 1/2 and solve t=ln 2/k.
Study notes
Half-life of a first-order reaction
This formula applies to a first-order rate law and not generally to zero- or second-order reactions.
UniversityHalf-life of a first-order reaction · formula reference
This formula applies to a first-order rate law and not generally to zero- or second-order reactions.
University