If the density of some lake water is 1.25 g mL−1 and contains 92 g of Na+ ions
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Number of moles present in 92 g of Na+ ions
= 92g/23g mol^-1
= 4 mol
Therefore, molality of Na+ ions in the lake
=4 mol/1kg
=4m
= 92g/23g mol^-1
= 4 mol
Therefore, molality of Na+ ions in the lake
=4 mol/1kg
=4m
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