Initial concentration of reactant in a first order reaction is $0.08 \text{ mol dm}^{-3}$. What concentration would remain after $40 \text{ minutes}$? (Given $\frac{[A]_0}{[A]_t} = 5.00$)
- A$0.008 \text{ mol dm}^{-3}$
- B$0.08 \text{ mol dm}^{-3}$
- C$0.016 \text{ mol dm}^{-3}$
- D$0.032 \text{ mol dm}^{-3}$
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