“Ingredients” or substance present at the start of a chemical reaction are called? Group of answer choices

coefficients

reactants

products

yields

reactants

Explanation:

The ingredients or materials present at the start of a chemical reaction are called the reactants.

Reactants are species that combines at the start of a reaction to give a product.

For example:

     A + B →   C

A and B are the reactants

C is the product of the reaction

 Therefore, every specie on the left hand side of the reaction are the reactants on the those on the right hand side are the products.