Answers

2016-03-10T07:26:11+08:00
Chemical change usually irreversible chemical reaction involving the rearrangement of the CHANGE in their CHEMICAL properties or composition , resulting in the information of at least one new substance. The formation of rust on iron is a chemical change
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2016-03-10T14:45:43+08:00

the following are representation or evidences of chemical reaction

- change in color

-change in odor

-production of gas ( smoke or bubbles)

-change in temperature

-production of precipitate or tiny solid particles

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