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

What do we call the substances that undergo a chemical change?

Back

Reactants

Front

What do we call the substances that are formed as a result of a chemical reaction?

Back

Products

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, usually measured in grams or kilograms.

Front

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

Back

The total mass remains the same; it is conserved.

Front

What is a precipitate?

Back

A precipitate is a solid that forms when two liquids are mixed together.

Front

If you mix 200 grams of salt with 300 grams of water, what will be the total mass of the solution?

Back

500 grams.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash, smoke, and gases.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.