Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction.

Front

How many total atoms are present in the reaction 2SO2 + 2H2O2?

Back

There are 8 atoms in total: 4 Sulfur (S) and 4 Oxygen (O) from the reactants.

Front

If 12.67 g of Carbon reacts with 25.33 g of Oxygen, what is the mass of Carbon Dioxide produced?

Back

38 g of Carbon Dioxide is produced.

Front

In a chemical reaction, if the mass of the reactants is 20 g, what is the mass of the products?

Back

The mass of the products must also be 20 g, according to the Law of Conservation of Mass.

Front

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

Back

The mass of the reactants remains equal to the 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

How do you calculate the mass of a missing reactant in a chemical reaction?

Back

Subtract the mass of known products from the total mass of reactants.

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

In the reaction A + B -> C, if B has a mass of 9g and C has a mass of 14g, what is the mass of A?

Back

The mass of A is 5g.