Practice Law of Conservation of Matter

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a closed system; the total mass remains constant during a chemical reaction.

Front

What happens to the total mass during a chemical reaction in a closed container?

Back

The total mass remains the same.

Front

If 5 grams of substance X reacts with 7 grams of substance Y, what is the total mass of the products?

Back

12 grams.

Front

What is an example of a scenario that violates the Law of Conservation of Mass?

Back

Mixing two substances in an open container and noticing the mass decreases.

Front

What happens to the mass during a physical change, such as dissolving sugar in water?

Back

The total mass remains the same.

Front

How many cups are in 14 pints of apple juice if there are 2 cups in each pint?

Back

28 cups.

Front

What is a closed system in the context of chemical reactions?

Back

A closed system is one where no matter enters or leaves, allowing for the observation of the Law of Conservation of Matter.

Front

What is an example of a chemical reaction that demonstrates the Law of Conservation of Matter?

Back

Combining baking soda and vinegar in a sealed bag where the mass remains unchanged.

Front

What is the significance of measuring mass before and after a chemical reaction?

Back

It helps to confirm that the total mass remains constant, supporting the Law of Conservation of Matter.

Front

What is the difference between a physical change and a chemical change regarding mass?

Back

In both physical and chemical changes, the total mass remains the same.