Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.

Front

How can you determine if a chemical equation is balanced?

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Front

What happens to atoms during a chemical reaction according to the Law of Conservation of Mass?

Back

Atoms rearrange to form new substances, but the total number of atoms remains constant.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What does it mean for a chemical equation to be unbalanced?

Back

An unbalanced chemical equation has a different number of atoms of one or more elements on each side of the equation.

Front

Give an example of a balanced chemical equation.

Back

4Al + 3O₂ → 2Al₂O₃ is an example of a balanced chemical equation.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is important because it reflects the conservation of mass and ensures that the same amount of each element is present before and after the reaction.

Front

What occurs when wood and oxygen are burned according to the Law of Conservation of Mass?

Back

When wood and oxygen are burned, the atoms rearrange to form smoke, ash, and gases, but the total mass remains the same.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction and help balance the equation.