Understanding chemical equations is difficult.

We are growing vegetables without using chemical fertilizers.

Oxygen, which is one of the chemical elements, is necessary for us to breathe.

Understanding chemical equilibrium is very important in understanding chemical reactions.

This substance undergoes a chemical change when heat is applied.

In this experiment, you can observe a chemical reaction.

The study of organic compounds is an important field in chemistry.

Unsaturated fatty acids are said to be good for health.

The pH of this liquid is 7.

Arsine is a colorless, odorless, and highly toxic gas.