Asked by Josh

a certain first order decomposition reaction has a half-life of 15.0 minutes. What is the rate constant for this reaction?

what is the time it will take for the reaction to reach the 10% completion point?
Answered by DrBob222
k = 0.693/t<sub>1/2</sub>

ln(No/N) = kt
No = 100
N = 90
k from above.
Solve for t.
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