This chemical reaction is very dangerous.

There is a possibility that an earthquake may happen.

This chemical reaction occurs between homogeneous substances.

They are making products using materials of the same nature.

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

This chemical reaction is very dangerous.

This chemical reacts when heat is added.

He is majoring in chemistry at university.

What is this material made of?

During summer vacation, I will go to the beach.