<span>0.9% glucose solution means there are 0.9 g of glucose per 100 mL water. </span><span> The concentration is required per litre for molar concentration: 0.9% glucose solution contains 9 g of glucose per 1000 mL or 1 L of water. Molar mass of glucose is 180.16 g mol^-1 so 9 g = 9g/180.16 g mol^-1 = 0.05 moles </span><span> 1 L of water contains 0.05 moles of glucose so molar concentration is 0.05 M or 0.05 mol/L </span>