Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed.

Front

What is a coefficient in a chemical equation?

Back

A number in front of a compound or element that indicates how many molecules or atoms are present.

Front

What does the Law of Conservation of Mass state?

Back

The mass of the reactants equals the mass of the products.

Front

If 24 g of magnesium reacts with 38 g of fluorine, what is the mass of magnesium fluoride produced?

Back

62 g.

Front

Which of the following chemical equations is balanced? CH₄ + O₂ → CO₂ + 2H₂O, H₂ + O₂ → 2H₂O₄, 4Al + 3O₂ → 2Al₂O₃

Back

4Al + 3O₂ → 2Al₂O₃.

Front

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

Back

The total mass remains constant; it is neither created nor destroyed.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

How can you tell if a chemical equation is balanced?

Back

The number of atoms of each element is the same on both sides of the equation.

Front

What is the significance of balancing chemical equations?

Back

It reflects the Law of Conservation of Mass, ensuring that mass is conserved.