Chemical Reactions and Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that during a chemical reaction, mass is neither created nor destroyed.

Front

What are reactants in a chemical reaction?

Back

Reactants are the substances that go into a chemical reaction.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

Which equation demonstrates the Law of Conservation of Mass?

Back

2Na + Cl₂ ➡️ 2NaCl

Front

Which equation does not demonstrate the Law of Conservation of Mass?

Back

P₄ + 5O₂ ➡️ 2P₄O₁₀

Front

What happens to the mass of reactants during a chemical reaction?

Back

The total mass of the reactants is equal to the total mass of the products.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

Why is balancing chemical equations important?

Back

Balancing chemical equations is important because it reflects the conservation of mass and ensures accurate stoichiometric calculations.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each substance involved in the reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.