How many elements of oxygen are present in the molecule below 3Ca(OH)2

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How many elements of oxygen are present in the molecule below 3Ca(OH)2

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Cherry 2 weeks 2021-09-01T11:44:57+00:00 1 Answers 0 views 0

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    2021-09-01T11:46:02+00:00

    Answer:

    Two elements of oxygen are presented.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )