Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, the mass of the reactants before a chemical reaction is equal to the mass of the products after the reaction.

Front

True or False: The mass of the reactants is equal to the mass of the products?

Back

True

Front

True or False: During most chemical reactions, the amount of mass in the system stays the same?

Back

True

Front

What happens to mass during a chemical reaction?

Back

Mass is neither created nor destroyed; it remains constant.

Front

If 100 grams of coal are burned, how much mass should be present in the products?

Back

100 grams, assuming no mass is lost to the environment.

Front

How many grams of chocolate powder are shown in the example of conservation of mass?

Back

15 g

Front

How many grams of sliced apple are shown in the example of conservation of mass?

Back

230 g

Front

What is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?

Back

Burning wood, where the mass of the wood and oxygen equals the mass of the ash and gases produced.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product?

Back

A product is a substance that is formed as a result of a chemical reaction.