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15 April, 20:11

Which of the following provides evidence that a chemical change has taken place?

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  1. 15 April, 20:26
    0
    1,2, and 4 (which I assume was supposed to say 3)
  2. 15 April, 20:40
    0
    1) Bubbles appear

    2) Change of odour

    4) A precipitate is formed

    5) Change in temperature
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