The 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

How many atoms of Calcium (Ca) are in the compound Ca(OH)2?

Back

1 atom

Front

In the chemical formula C_{12}H_{22}O_{11}, how many different elements are present?

Back

3 elements (Carbon, Hydrogen, Oxygen)

Front

What is the mass of water after it freezes if 200 g of water is used?

Back

200 g

Front

In the chemical formula C_{12}H_{22}O_{11}, how many Oxygen (O) atoms are there?

Back

11 O atoms

Front

What is the chemical formula for baking soda?

Back

NaHCO3

Front

How many Oxygen (O) atoms are in the baking soda formula NaHCO3?

Back

3 O atoms

Front

What does a chemical formula represent?

Back

A chemical formula represents the elements in a compound and the number of atoms of each element.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

Front

What happens to the mass of substances during a chemical reaction?

Back

The total mass of substances remains constant; it is conserved.