5.P.2.2 Flashcard (Conservation of Mass)

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass cannot be created or destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.

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

If a solid object is melted, what happens to its mass?

Back

The mass remains the same because the object does not gain or lose mass just because it was melted.

Front

What is the mass of a solution made by dissolving 0.25 grams of baking soda in 5 grams of water?

Back

The mass of the solution is 5.25 grams.

Front

What happens to the weight of a glass of tea and ice after sitting in the sun?

Back

The weight will be less than 200 g because some of the liquid will evaporate into the atmosphere.

Front

If you start with 20 grams of reactants, how much product will you have?

Back

You will have a total of 20 grams of products.

Front

What is an example of a physical change?

Back

Melting ice is a physical change; the mass remains the same before and after melting.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change; it produces ash and gases, and the mass changes.

Front

How does temperature affect gas in a balloon?

Back

When the temperature increases, the gas expands, causing the balloon to get larger, but the mass remains the same.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into vapor, which can lead to a decrease in mass of the liquid.