Chemical Reactions

Front

What is the law of conservation of mass in a chemical reaction?

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

If the mass of reactants is 32 grams and 8 grams, what is the mass of the products?

Back

40 grams.

Front

How do you determine the number of atoms of each element in a chemical reaction?

Back

Count the number of atoms of each element on the reactant side of the equation.

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances with different properties.

Front

What is an example of a physical change?

Back

Phase change (e.g., melting, freezing) is an example of a physical change.

Front

Can atoms be created or destroyed in a chemical reaction?

Back

No, atoms cannot be created or destroyed in a chemical reaction.

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 difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of a substance.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.