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

What are reactants in a chemical equation?

Back

Reactants are the starting substances in a chemical reaction that undergo change to form products.

Front

What are products in a chemical equation?

Back

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

Front

What does a coefficient in a chemical equation represent?

Back

A coefficient indicates the number of molecules or moles of a substance involved in a reaction.

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of an element in a molecule.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, you adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

Why is it important to balance chemical equations?

Back

Balancing chemical equations is important because it reflects the conservation of mass and ensures that the reaction obeys the law of conservation of mass.

Front

What is the difference between a subscript and a coefficient?

Back

A subscript indicates the number of atoms of an element in a molecule, while a coefficient indicates the number of molecules or moles.

Front

In the equation 4NH3, what does the number 4 represent?

Back

The number 4 is a coefficient, indicating there are four molecules of ammonia (NH3).

Front

What happens to the number of atoms during a chemical reaction?

Back

The number of atoms remains the same; they are rearranged to form new substances.