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 must equal the mass of the products in a chemical reaction.

Front

If a chemical reaction starts with 20g of reactants, how much mass will the products have?

Back

20g of products.

Front

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

Back

True.

Front

What is an example of a substance that can be measured to demonstrate conservation of mass?

Back

Chocolate powder can be measured to show conservation of mass.

Front

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

Back

15g.

Front

How many grams of coal were present at the start of the chemical change?

Back

100g.

Front

How many grams of oxygen would be needed to show conservation of mass in a chemical reaction?

Back

7g.

Front

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

Back

Mass is neither created nor destroyed; it remains constant.

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.