Question

what is a reactant? something that comes out of a chemical equation something that goes into a chemical equation

Explanation:

In chemistry, a reactant is a substance that participates in a chemical reaction, meaning it is the substance that goes into (is used in) the chemical equation to undergo a reaction and form products. The option "something that comes out of a chemical equation" describes a product, not a reactant.

Answer:

The correct option is the one with "something that goes into a chemical equation" (the blue - colored option).