The use of chemical weapons is prohibited by international law.

I am majoring in biochemistry at university.

I love organic chemistry classes.

I am majoring in inorganic chemistry at university.

My major is chemical engineering.

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

I am majoring in physical chemistry at university.

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

Radioactive elements are produced in nature and scientific experiments.

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