1 g of a carbonate ( M_2 CO_3) on treatment with excess HCl produces 0.01 mol of CO_2. The molar mass of M_2 CO_3 is ____ g mol^-1. (Nearest integer)

$\displaystyle 1$ g of a carbonate $\displaystyle \left(\mathrm{M}_2 \mathrm{CO}_3\right)$ on treatment with excess HCl produces $\displaystyle 0.01$ mol of $\displaystyle \mathrm{CO}_2$. The molar mass of $\displaystyle \mathrm{M}_2 \mathrm{CO}_3$ is $\displaystyle \_\_\_\_$ $\displaystyle \mathrm{g} \mathrm{mol}^{-1}$. (Nearest integer)