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4 signs of a chemical change
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4 signs of a chemical change

User Iamisti
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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.
User Alan Judi
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change in color
change of temperature
formation of a gas
formation of precipitation

User Daniel Stenberg
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