Question

What is a chemical reaction?
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A chemical reaction happens only under special circumstances.
A chemical reaction is when the bonds of one substance form and then break which makes something different.
A chemical reaction has infinite possiblities to happen.
A chemical reaction is when the bonds of one substance break and form new bonds to make something different.
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Answer 1

Answer:

a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction