Properties and Changes of Matter

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 reactants equals the total mass of products.

Front

Define matter.

Back

Matter is anything that has mass and takes up space.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.

Front

What is a chemical property?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction, indicating how a substance interacts with other substances.

Front

What is the difference between intensive and extensive properties?

Back

Intensive properties do not depend on the amount of substance present (e.g., density), while extensive properties do depend on the amount of substance (e.g., mass, volume).

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

How do you calculate the total mass of products in a reaction?

Back

To calculate the total mass of products, add the masses of all reactants together, according to the law of conservation of mass.

Front

What is the difference between a reactant and a product?

Back

A reactant is a substance that undergoes a chemical change in a reaction, while a product is a substance that is formed as a result of that reaction.

Front

What is an example of an extensive property?

Back

An example of an extensive property is the mass of a substance.