Understanding chemical equilibrium is very important in understanding chemical reactions.

In this experiment, you can observe a chemical reaction.

This substance undergoes a chemical change when heat is applied.

The use of chemical weapons is prohibited by international law.

I am majoring in biochemistry at university.

My major is chemical engineering.

I am majoring in inorganic chemistry at university.

Analytical chemistry is a science that reveals the composition and structure of substances.

I am majoring in physical chemistry at university.

This chemical reaction is very dangerous.