Chemistry, 19.01.2021 14:00, hsjsjsjdjjd
В колбу осторожно отсыпали 0,2 моль сульфата натрия, а затем добавили 0,7 моль сульфида меди (II). Определите массовую долю серы в полученной смеси (в %, ответ округлите до десятых). Атомную массу меди примите равной 64.
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В колбу осторожно отсыпали 0,2 моль сульфата натрия, а затем добавили 0,7 моль сульфида меди (II). О...
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