For a first-order reaction,it takes $20 \, \text{min}$ for the concentration to decrease from $1 \, M$ to $0.6 \, M$. How much time is required for the concentration to decrease from $0.6 \, M$ to $0.36 \, M$?
- AMore than $20 \, \text{min}$
- BLess than $20 \, \text{min}$
- CExactly $20 \, \text{min}$
- DInfinite
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