Chemotransmitters play an important role in the transmission of information between nerve cells.

Stoichiometry is a method for calculating the amount of substances in a chemical reaction.

No chemical flavoring is used in this ramen at all.

This chemical reaction is very dangerous.

This chemical reacts when heat is added.

He bought a new jacket.

My room is on top of the building.

This book is the first volume of a trilogy.

We will make a decision after listening to his opinion.

It is important to understand the importance of health.