Law of conservation of mass

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction.

Front

Do gases have mass?

Back

Yes, gases have mass, even though they may be less dense than solids or liquids.

Front

What happens to the total mass of reactants in a chemical reaction?

Back

The total mass of the reactants is equal to the total 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 of magnesium fluoride is produced.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the Law of Conservation of Mass is upheld.

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the subscripts in the formula; if no subscript is present, it is assumed to be 1.

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

Can mass be lost during a chemical reaction?

Back

No, mass cannot be lost; it is conserved.

Front

What is the role of coefficients in a balanced chemical equation?

Back

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