Question

what do mean by chemical change .
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Answer 1

Answer:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. ... An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.

Explanation:

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Answer 2

Answer:

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Explanation:

Chemical change occur When a substance combines With another to From a new substance called chemical change