I am majoring in physical chemistry at university.

I love organic chemistry classes.

He is dedicated to the study of immunochemistry.

Thermochemistry is a part of chemistry that deals with the reactions of heat and matter.

Chemical pollution has a serious impact on the health of the Earth.

This shirt is made of chemical fiber.

He is suffering from combat stress reaction.

When she said thank you, I replied you're welcome.

He had a doctor look at his oesophagus problem.

How do you solve this problem?