Final answer:
A balanced chemical equation does not directly indicate the mass of products and reactants but provides their relative amounts in moles. Options (A), (B), and (D) correctly describe functions of a balanced equation, while Option (C) does not.
Step-by-step explanation:
A balanced chemical equation is a written representation of a chemical reaction that adheres to the law of conservation of mass. When balancing a chemical equation, it is important to make sure the number of atoms of each element is the same on both sides of the equation without changing the subscripts of reactants or products, as this would alter their chemical identities. The question asks which option does not represent a function of a balanced equation. Options (A) and (B) correctly state that a balanced equation identifies all substances involved and shows their composition. Option (D) also correctly states that it accounts for all atoms involved in the reaction. However, Option (C) claims that a balanced equation indicates the mass of products and reactants, which isn't correct because while the equation shows the relative amounts of each substance in terms of moles, it does not directly indicate their mass.