Calculate the rate constant for the first order reaction,$A \rightarrow B$ if the rate of reaction is $5.4 \times 10^{-6} \ mol \ dm^{-3} \ s^{-1}$ and $[A]=0.3 \ M$.
- A$1.8 \times 10^{-5} \ s^{-1}$
- B$1.5 \times 10^{-5} \ s^{-1}$
- C$2.1 \times 10^{-5} \ s^{-1}$
- D$2.4 \times 10^{-5} \ s^{-1}$
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