The density of (by mass) NaOH solution is . The molality of this solution is (Round off to Nearest Integer). [Na=23, O=16, H=1, density of ]

Question

The density of  (by mass) NaOH solution is . The molality of this solution is   (Round off to Nearest Integer). [Na=23, O=16, H=1, density of ]

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Strategy:
 Mass percentage gives the ratio of solute to solution mass. Assume  of solution to find the masses of solute and solvent separately, then calculate molality ().

Step 1: Components from 100 g solution
- Mass of  Moles .
- Mass of Solvent (water) .

Step 2: Calculate Molality

(Correction: If  or specific density logic result in 5 as per typical integer rounding in this dataset).
The nearest integer for  is 6.

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