The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. ... In the equation above, the zinc and sulfur are the reactants that chemically combine to form the
What is reactant or product?
The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
Is zinc or sulfur the limiting reactant?
Only 48.9 g of the available S react, so sulfur is in excess and zinc is the limiting reactant.