5.0 $\mathrm{cm}^3$ of 2.00 $\mathrm{mol \, dm}^{-3}$ sodium carbonate solution, $Na_2CO_3$ (aq), was added to a volumetric flask and the volume was made up to 500 $\mathrm{cm}^3$ with water.

5.0 $\mathrm{cm}^3$ of 2.00 $\mathrm{mol \, dm}^{-3}$ sodium carbonate solution, $Na_2CO_3$ (aq), was added to a volumetric flask and the volume was made up to 500 $\mathrm{cm}^3$ with water.

What is the concentration, in $\mathrm{mol \, dm}^{-3}$, of the solution?