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ratelena [41]
2 years ago
5

How do you know when a chemical reaction has taken place?

Biology
1 answer:
eimsori [14]2 years ago
7 0

Answer: You can tell when a chemical reaction is taking place because it is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. All these things characterize what you look out for to find a chemical change.

Explanation:

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