Solution of $12 \mathrm{~g}$ of non-electrolyte (A) prepared by dissolving it in $1000 \mathrm{~mL}$ of water exerts the same osmotic pressure as that of $0.05 ~\mathrm{M}$ glucose solution at the same temperature. The empirical formula of $\mathrm{A}$ is $\mathrm{CH}_{2} \mathrm{O}$. The molecular mass of $\mathrm{A}$ is __________ g. (Nearest integer)