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 reactants equals the total mass of products.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes a 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

How can you determine if mass is conserved in a chemical reaction?

Back

By comparing the total mass of the reactants to the total mass of the products; they should be equal.

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances, but the total number of atoms remains the same.

Front

What is an example of a physical change?

Back

Melting ice is a physical change; the substance remains water.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change; it transforms into ash and gases.

Front

What does balancing a chemical equation ensure?

Back

Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides of the equation.

Front

What is the significance of coefficients in a chemical equation?

Back

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

Front

What is the difference between physical properties and chemical properties?

Back

Physical properties can be observed without changing the substance, while chemical properties describe how a substance reacts with others.