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DedPeter [7]
3 years ago
12

In a first-order reaction, the half-life is 139 minutes. What is the rate constant?

Chemistry
1 answer:
Valentin [98]3 years ago
3 0

Answer:

a. 8.31 x 10-5 s-1

Explanation:

The general first-order reaction is:

ln[A] = ln[A]₀ -kt

<em>Where [A] is acutal concentration of reactant, initial concentration is [A]₀, k is rate constant and t is time pass</em>

And the equation of the half-life, t 1/2, is:

t_{1/2} = \frac{ln 2}{K}

Has half-life is 139min:

139min * (60s / 1min) = 8340s

t_{1/2} = \frac{ln 2}{8340s}

Half-life is 8.31x10⁻⁵ s⁻¹

<h3>a. 8.31 x 10-5 s-1 </h3>

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