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28 March, 03:37

4 signs of a chemical change

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Answers (2)
  1. 28 March, 05:25
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    There are four signs that a chemical reaction has occurred: a change in color, a change in temperature, formation of a gas or formation of a precipitate. A precipitate is a solid that forms when two liquid solutions are mixed.
  2. 28 March, 06:53
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    Change in color

    change of temperature

    formation of a gas

    formation of precipitation
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