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Aiden Beard
Physics
3 August, 02:02
We know a chemical reaction has occurred when
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Claudia
3 August, 02:29
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You can tell a chemical reaction has occurred when one of these things happen:
1) The chemical or substance you're working with changes colors.
2) Bubbles appear, indicating a gas has formed.
3) The odor of the substance changes.
4) The temperature of the chemical changes.
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