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 chemical reaction; it can only change forms.

Front

What happens to the mass of reactants in a chemical reaction?

Back

The mass of the reactants equals the mass of the products.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation shows the number of atoms involved in a reaction, ensuring that the same number of each type of atom is present on both sides.

Front

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

Back

The reaction of sodium sulfate and barium chloride to form sodium chloride and barium sulfate, where the mass of reactants equals the mass of products.

Front

If 10 grams of mercuric oxide decomposes to form liquid mercury and oxygen, how do you find the mass of oxygen produced?

Back

Subtract the mass of liquid mercury from the mass of mercuric oxide: 10 g - 9.3 g = 0.7 g of oxygen.

Front

What does it mean when we say 'matter is conserved'?

Back

It means that the total mass of substances before and after a chemical reaction remains constant.

Front

How does heating affect the state of matter in a chemical reaction?

Back

Heating can cause a substance to change from solid to liquid or gas, but the total mass remains the same.

Front

What is the relationship between the mass of solid carbon dioxide and carbon dioxide gas after sublimation?

Back

They have the same mass, even though their volumes may differ.

Front

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

Back

Melting ice into water; the mass remains the same before and after the change.

Front

What is the significance of a chemical equation being balanced?

Back

A balanced chemical equation ensures that the Law of Conservation of Matter is upheld, showing that mass is conserved.