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 substances in a closed system during a chemical reaction?

Back

The total mass of substances in a closed system remains constant before and after a chemical reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products so that the number of atoms of each element is the same on both sides.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in the reaction.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, where the state of matter changes but the mass remains the same.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, where the wood transforms into ash, smoke, and gases.

Front

What is the mass of a solution if 20g of sugar is dissolved in 100g of water?

Back

The mass of the solution is 120g (20g sugar + 100g water).

Front

What happens to the mass of a substance when it changes state from liquid to solid?

Back

The mass remains the same; it does not change when a substance changes state.