Law of conservation of mass

Front

What does the Law of Conservation of Mass state?

Back

Mass is never created or destroyed in a chemical reaction.

Front

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

Back

Matter can only be transformed or changed, not created or destroyed.

Front

In a chemical reaction, how can you determine if the Law of Conservation of Mass holds true?

Back

By measuring the total mass of reactants and products; they should be equal.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change.

Front

In the reaction 2Mg + O2 -> 2MgO, identify the reactants.

Back

The reactants are magnesium (Mg) and oxygen (O2).

Front

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

Back

62 g of magnesium fluoride is produced.

Front

What is an example of a physical change that demonstrates the Law of Conservation of Mass?

Back

Melting ice; the mass before and after melting remains the same.

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Front

How can you experimentally verify the Law of Conservation of Mass?

Back

By conducting a closed system reaction and measuring the mass before and after.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the number of atoms for each element is conserved.