Tube and Contents Molality 1 10 g dl NaCl 2 36 gal Na B 0.8 g/dl. Na 0.145 m 0.45 g dL NaCl Approximately the concentration of seawater. Note: dL 100 mL. Milli osmolality 290 mosm Visual Appearanc of RBCs Solution S. No. Tube and contents molarity osmolarity 1 10 g/dL 1.711 3.422 2 3.5 g/dL 0.599 1.198 3 0.85 g/dL 0.145 0.29 4 0.45 g/dL 0.077 0.154 5 0.20 g/dL 0.034 0.068.