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14 September, 08:17

When a substance undergoes a chemical change what occurs?

O Physical reaction

Physical & Chemical reactions

Chemical reaction

Combustion reaction

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Answers (2)
  1. 14 September, 08:23
    0
    The answer is physical and chemical reactions.
  2. 14 September, 08:35
    0
    Physical and Chemical reactions

    Explanation:

    just did it in school
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