This oxide is a compound made up of oxygen and other elements.

Calcium oxide is one of the main components of cement.

Peroxidation is one of the chemical reactions, especially involved in the oxidation of lipids.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.

It's difficult to decipher this chemical equation.

Understanding chemical equations is difficult.

He is an expert in chemical analysis.

We are growing vegetables without using chemical fertilizers.