Question

1. what are the substances to the left of the arrow in a chemical equation called?

what are the substances to the right of the arrow in a chemical equation called?
what does the arrow itself mean?

Explanation:

In a chemical equation, the substances to the left of the arrow are reactants, which undergo a chemical change. The substances to the right of the arrow are products, which are formed as a result of the reaction. The arrow itself indicates the direction of the reaction, from reactants to products.

Answer:

1. The substances to the left of the arrow in a chemical equation are called reactants.
2. The substances to the right of the arrow in a chemical equation are called products.
3. The arrow in a chemical equation itself means the direction of the reaction (from reactants to products).