Top 10 Doctor insights on: What Causes Big Stomach. 1 Is eating late(around 7and8 in the evening)the cause of ones stomach growing big? Calories: It's calories that count,not necessarily when you eat them, that causes weight gain. New weight accumulates in the abdominal area most often.
A: In a chemical reaction, the reactants are the elements present when the reaction begins, and the products are the elements and compounds produced as a result of the reaction. In a chemical formula, the reactants are on the left side of the arrow, and the products are on the right.
  The substances that are initially present and consumed in a chemical reaction are called reactants and the substance which is formed at the end of the reaction is called â¦ products..eactants are the substances used in a chemical reaction, usually on the left side of the reaction arrow. The products are the things that are made after the reacton is comple â¦ te. 7 people found this useful.