He is an expert in chemistry.

Where is his place of origin?

It is important to understand the importance of health.

We observed the reaction using soda ash in a chemistry experiment.

Carbonate of soda is a versatile substance that can be used for laundry and cleaning.

The diagonal elements of this matrix are all 1.

This inorganic compound plays an important role in chemical reactions.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.