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; it can only change forms.

Front

If you have 5 ounces of ice cream and it melts, what is the weight of the melted ice cream?

Back

5 ounces, because the mass remains the same.

Front

What happens to the mass of a substance when it melts?

Back

The mass stays the same; it does not increase or decrease.

Front

If a jeweler melts silver, what happens to the mass of the silver?

Back

The mass stays the same.

Front

What is an example of a physical change?

Back

Melting ice is a physical change; the ice changes from solid to liquid but its mass remains the same.

Front

If you mix 10 ounces of liquid X with 12 ounces of liquid Y, what is the total mass of the mixture?

Back

The total mass is 22 ounces, assuming no mass is lost.

Front

What is the total weight of an ice cube and water if it is 1.5 pounds before the ice cube melts?

Back

1.5 pounds, because the mass remains the same after melting.

Front

What happens to the mass of leaves when they fall to the ground?

Back

The mass remains the same; it does not change.

Front

If a closed container weighs 3 ounces and contains 10 ounces of liquid X and 12 ounces of liquid Y, what is the total weight of the container with the liquids?

Back

25 ounces, because the weight of the liquids and the container is added together.

Front

What is a closed system in the context of mass conservation?

Back

A closed system is one where no mass can enter or leave, allowing for accurate measurement of mass before and after a reaction.