Which fundamental law is the basis for balancing chemical equations?

• A. Law of Definite Proportions
• B. Law of Multiple Proportions
• C. Law of Conservation of Energy
• D. Law of Conservation of Mass

Answer: (D)

Verified step by step guidance

1. Understand that balancing chemical equations is about ensuring the same number of atoms of each element are present on both sides of the equation.
2. Recall that the Law of Conservation of Mass states that mass cannot be created or destroyed in a chemical reaction.
3. Recognize that this law implies the total mass of reactants must equal the total mass of products, which means atoms are neither lost nor gained during the reaction.
4. Apply this principle when balancing equations by adjusting coefficients to have equal numbers of each type of atom on both sides.
5. Conclude that the Law of Conservation of Mass is the fundamental law that forms the basis for balancing chemical equations.