5P22 Matter: Law of 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

If 15 grams of sugar is dissolved in 300 grams of water, what is the total mass of the mixture?

Back

315 grams.

Front

What happens to the mass of an object when it is crushed or broken down?

Back

The mass remains the same; it is conserved.

Front

If an oreo cookie weighs 20 grams and is crushed, what is the weight of the crumbs?

Back

20 grams.

Front

What is the mass of water after freezing?

Back

The mass remains the same; if 200 grams of water is frozen, it will still weigh 200 grams.

Front

If 25 grams of sugar dissolves in 150 grams of water, what is the new weight of the liquid?

Back

175 grams.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties.

Front

How do you calculate the total mass of a mixture?

Back

Add the mass of all components together.

Front

What is an example of a physical change?

Back

Crushing a cookie is a physical change; the mass remains the same.

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.