Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

Give an example of a chemical reaction.

Back

Cookies baking in an oven.

Front

What is the Law of Conservation of Mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

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

Back

25 atoms.

Front

Is melting ice a chemical or physical change?

Back

Physical change.

Front

What do coefficients in a chemical equation represent?

Back

The number of molecules of each reactant used and the number of molecules of each product made.

Front

What is the difference between a reactant and a product?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What happens to the atoms in a chemical reaction?

Back

Atoms are rearranged to form new substances, but they are not created or destroyed.