Question

what is a chemical reaction
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Answer 1

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.

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Answer 2

Answer:

chemical reaction is reaction that elements and compound are present each together. in equation.

Explanation:

chemical reaction in one or more substances are combined and produce a new product which present elements and compound. are many properties of the new products.

at last of reaction produce product.like

2Mg+O2------>2MgO