The density of \( 3 \mathrm{M} \) solution of \( \mathrm{NaCl} \) is \( 1.25 \mathrm{~g} / \math...

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The density of \( 3 \mathrm{M} \) solution of \( \mathrm{NaCl} \) is \( 1.25 \mathrm{~g} / \mathrm{ml} \). Calculate molality of the solution.
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