Chemistry - Chemical Kinetics Question with Solution | TestHub

The rate constant of a zero order reaction is $2.0\times$ $10^{-2}\mathrm{mol}{\mathrm{L}}^{-1}{\mathrm{s}}^{-1}$. If the concentration of the reactant after 25 seconds is $0.5\mathrm{M}$. What is the initial concentration?