raneemawado66 raneemawado66

25-02-2021
Chemistry

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What is a sign that a chemical change has occurred?

The physical properties are the same
The state of the matter has changed.
The production of heat, light, or smoke is observed.

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Iamsweet Iamsweet

25-02-2021

Answer:

The production of heat, light, or smoke is observed.

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Аноним Аноним

25-02-2021

The production of heat, light or smoke is observed and the state of matter has changed

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