Chemical Reactions

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, indicating that mass is conserved during the reaction.

Front

Where are the reactants located in a chemical equation?

Back

The reactants are located on the left side of the chemical equation.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, such as baking powder fizzing.

Front

Give an example of a chemical reaction.

Back

Cookies baking in an oven is an example of a chemical reaction.

Front

How many atoms are in a molecule of serotonin (C10H12N2O)?

Back

There are 25 atoms in a molecule of serotonin.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a 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 does it mean to conserve mass in a chemical reaction?

Back

Conserving mass means that the total mass of reactants equals the total mass of products in a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.

Front

What is an example of a physical change?

Back

Melting chocolate is an example of a physical change.