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If the time elapsed is 4.26 min, what is the value of the rate constant, k?

ln[R]t / [R]o = -0.0237

I am not sure how to slove this.

Would I do ln 4.26 minutes times -0.0237???

• chemistry(?) -

How are you defining k?
Are you taking the ln of [R] or of [R(t)]/R(0)] ?
Is [R] the concentration of a reactant?

This looks like an equation for first-order chemical decomposition or radioactive decay.

If [R(t)] = [Ro]e^-kt, then
ln{[R(t)]/R(0)]} = -kt
If -kt = -0.0237 when t = 4.26 min, then
k = 5.56*10^-3 min^-1

Ok how did you get 5.56e-3???

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If the time elapsed is 4.26 min, what is the value of the rate constant, k?

If the time elapsed is 4.26 min, what is the value of the rate constant, k?