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The substances that are before a reaction are the REACTANTS, and after the reaction, the substances left are the PRODUCTS.

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13y ago

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What are the materials you have at the beginning of a chemical reaction called?

The starting materials in a chemical reaction are called reactants.


What is the substance present at the start of a reaction?

The substance present at the start of a chemical reaction is called a reactant. Reactants are the starting materials that undergo chemical changes to form products during a reaction.


What are the substances that are present before the reaction called in science?

The substances present before a chemical reaction are called reactants. These are the starting materials that undergo a transformation to form new products during the reaction.


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The substances present when a chemical reaction begins?

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Reactants are the starting materials that are present at the beginning of a chemical reaction, while products are the substances that are formed as a result of the reaction. Reactants undergo a chemical change to form products during the reaction.


Substances that are present before the reaction?

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Are the substances present before the reaction?

Substances that are present before the reaction are called "reactants" or "reagents".


What is present after a chemical reaction?

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What are the starting materials in a chemical reaction-?

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What are the reactant of a reaction?

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