... Chemistry is the science of substances - of their structure, their properties, and the reactions that change them into other substances The study of chemistry may be divided into the following ... Organic chemistry, which is the chemistry of the compounds of carbon - Physical chemistry, which studies the quantitative relations among the properties of substances and their reactions - Biochemistry, ... methods of accurate determination of the amounts of different substances present in a sample of material - Inorganic chemistry, which is the chemistry of elements other than carbon, and their compounds...