8.5E - 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 total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction.

Front

If a reaction starts with 75g of reactants, how much mass of products should be produced?

Back

75g of products.

Front

In a chemical reaction, if 2g of Hydrogen and 4g of Oxygen react, how much water is produced?

Back

6g of water.

Front

When 12g of Carbon reacts with 16g of Oxygen, how much carbon monoxide (CO) is formed?

Back

28g of carbon monoxide.

Front

In the reaction A + B -> C, if reactant A has 5g and product C has 9g, how much does reactant B weigh?

Back

4g.

Front

What does it mean for a chemical reaction to be balanced?

Back

A chemical reaction is balanced when both sides have the same number of atoms.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes a 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

How do you calculate the total mass of products in a reaction?

Back

The total mass of products is calculated by adding the masses of all reactants.

Front

What is the significance of balancing a chemical equation?

Back

Balancing a chemical equation ensures that the Law of Conservation of Mass is upheld, meaning mass is neither created nor destroyed.