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, mass is neither created nor destroyed during a chemical reaction.

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 of each element.

Front

If you mix 125 grams of sugar, 250 grams of water, and 5 grams of flavoring, what is the total weight of the solution?

Back

The total weight of the solution is 380 grams.

Front

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

Back

Matter cannot be created or destroyed; it can only be transformed or changed.

Front

If 4 grams of hydrogen and 32 grams of oxygen combine, what is the mass of the water produced?

Back

The mass of the water produced is 36 grams.

Front

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

Back

Reactant B has 4 grams.

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

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in the reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.