Ответы 1
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Химическая формула показывает атомы каких элементов и в каком количестве входят в состав вещества. Например: — четыре молекулы серной кислоты. В состав молекулы входят: два атома водорода, один атом серы и четыре атома кислорода.
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Автор:
caratfwt - 5 лет назад
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