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451. Сколько граммов нитрата калия выкристаллизуется из 105 г насыщенного при 60 °С раствора, если охладить его до 0 °С? Коэффициенты растворимости соли при указанных температурах соответственно равны 110 и 13 г в 100 г H2O.
