The osmotic pressure of blood is 7.47 bar at 450K. To inject glucose to a patient intravenously, it has to be isotonic with blood. The concentration of glucose solution in ${\text{gL}}^{-1}$ is _________(Molar mass of glucose = 180  $g{\text{ mol}}^{-1}$ R = 0.083 L bar ${\text{K}}^{-1}{\text{mol}}^{-1}$ ) (Nearest integer)