57. Solving a chemistry problem
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280. At what temperature will aqueous solutions of sodium chloride (NaCl), calcium chloride (CaCl2) and zinc sulfate (ZnSO4) with concentrations of 0.5 mol / l freeze and boil, if the cryoscopic and ebullioscopic constants of water are respectively 1.86 and 0 .52 kg * K / mol?
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