The ejecta from the volcano plays an important role in shaping the terrain.

He refused to clean up the vomit.

This mineral is very rare.

My favorite bowl dish is Oyakodon.

His art style is unique, it's neither fish nor fowl.

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.