He is a person of strong vanity who reads self-improvement books.

He is suffering from combat stress reaction.

He is facing many difficulties due to gender identity disorder.

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

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

No chemical flavoring is used in this ramen at all.

My company specializes in the manufacture of fine chemicals.

The concept of chemical equivalent is essential for understanding chemical reactions.

Gender discrimination is one of the social issues that needs to be resolved.

It's difficult to understand his real nature.