Question

what are chemical reactions​

Answer 1

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Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

Answer 2

Answer:

A process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

Explanation:

Combination (Synthesis) reaction.

Decomposition reaction.

Displacement reaction.

Double displacement reaction.

Combustion reaction.