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химия

1-4 класс

В порции поваренной соли NaCl суммарное число атомов всех элементов равно 30,1⋅1023. Вычисли химическое количество поваренной соли. Вычисляй с точностью до сотых. В ответе запиши число. Например: 2,55.

валерия 13 сент. 2018 г., 23:05:31 (4 дня назад)
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