9. 1 Chemical reactions are represented by chemical equations During a chemical reaction, one or more new compounds are formed as a result of the rearrangement of atoms The chemical reaction can be represented by a chemica/ equation(化学反应式), Which shows the substances about to react, called reactants(反应物),t the left of an arrow that points to the newly formed substances, called products(产物) reactant s products9.1 Chemical reactions are represented by chemical equations During a chemical reaction, one or more new compounds are formed as a result of the rearrangement of atoms. The chemical reaction can be represented by a chemical equation (化学反应式), which shows the substances about to react, called reactants (反应物), to the left of an arrow that points to the newly formed substances, called products (产物)