P2.2 - Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of the reactants equals the total mass of the products.

Front

What happens to the mass of water when it freezes into ice?

Back

The mass of the ice is the same as the mass of the water before it froze.

Front

If you dissolve 0.25 grams of baking soda in 5 grams of water, what is the total mass of the solution?

Back

The total mass of the solution is 5.25 grams.

Front

How do you calculate the total weight of multiple objects?

Back

Add the weights of each object together. For example, if you have Legos weighing 5g, 9g, 7g, and 2g, the total weight is 5 + 9 + 7 + 2 = 23g.

Front

What happens to the mass of a balloon when it is warmed?

Back

The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.

Front

What is an example of a physical change that does not affect mass?

Back

Freezing water into ice is a physical change that does not affect the mass.

Front

What is the mass of a glass of water that weighs 12 ounces with 6 ice cubes added?

Back

The total weight after the ice cubes melt will be approximately 18 ounces.

Front

What is the relationship between mass and volume in a closed system?

Back

In a closed system, the mass remains constant even if the volume changes.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change that results in new substances and a change in mass.

Front

How does temperature affect the state of matter?

Back

Increasing temperature can change a solid to a liquid (melting) or a liquid to a gas (evaporation), but the mass remains the same.