11. Solving a chemistry problem

11. Solving a chemistry problem

172. An aqueous salt solution had a concentration of 80 kg/m3 before evaporation and a density of 1040 kg/m3, after evaporation the concentration became 840 kg/m3, density 1555 kg/m3. Determine the mass of evaporated water per 1000 m3 of the initial solution.

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