what is chemical changes???????143
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chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.
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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. These processes are called chemical reactions and, in general, are not reversible except by further chemical
Explanation:
ex melting pf wax , ice to water or water to ice
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