(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A certain first-order reaction has a rate constant of 6.70×10−3 . How long will it take for the reactant concentration to drop to 1/8 of its initial value?

2. Relevant equations

half life =0.693/k

3. The attempt at a solution

half life = 0.693/(6.70×10−3) = 103.43

but after that I'm confused how many half lives does 1/8 refer to?

I tried doing it by half life =4 but the answer came wrong.

any help would be appreaciated.

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# Homework Help: Half life (very very simple question)

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