5 g of protein containing only glycine ( C_2 H_5 NO_2) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300…

$\displaystyle 5$ g of protein containing only glycine $\displaystyle \left(\mathrm{C}_2 \mathrm{H}_5 \mathrm{NO}_2\right)$ is dissolved in water to make $\displaystyle 500$ mL of solution. The osmotic pressure of this solution at $\displaystyle 300$ K is found to be $\displaystyle 5.03 \times 10^{-3}$ bar. The total number of glycine units present in the protein is \_\_\_\_. (Given : $\displaystyle \mathrm{R}=0.083 \mathrm{~L} \mathrm{bar} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ )