Chemical Kinetics

Calculate the rate constant for the first order reaction, \(\mathrm{A} \rightarrow \mathrm{B}\) if the rate of reaction is \(5.4 \times 10^{-6} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}\) and \([\mathrm{A}]=0.3 \mathrm{M}\).