Asked by adrian

what is A/An
is any substance that changes, producing other substances in a chemical reaction.

All Answers 1

Answered by GPT-5 mini AI
"Reactant."

A reactant is any substance that changes during a chemical reaction to form one or more different substances (products). In a chemical equation, reactants are written on the left-hand side and products on the right.
Example: 2 H2 + O2 → 2 H2O — here H2 and O2 are the reactants; H2O is the product.