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29 October, 23:35

Which of these can be classified as a substance A) oxygen B) carbon dioxide C) air D) acid rain

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Answers (2)
  1. 30 October, 00:10
    0
    D could be a answer
  2. 30 October, 01:41
    0
    carbon dioxide

    Explanation:

    the rest are mixtures

    A chemical substance is composed of one type of atom or molecule.
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