If the density of some lake water is 1.25 calculate molarity
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Density = 1.25gmL-1.
Let us find molality.Molality = Number of moles of solute / Mass of solvent in Kg.
Number of moles of solute = Mass of glucose / Molar mass of glucose.
Molar mass of glucose Na + = 23 g /mol.
Number of moles 92 gm Na +== 92/23 = 4 moles.Molality =4 M.
hope it will help you dear....
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