The manual contains a detailed presentation of the basics of general, inorganic and organic chemistry in a volume corresponding to advanced chemistry programs in high school and programs for entering universities. The manual presents all types of calculation problems with solutions and typical exercises with standard answers. For each topic studied, a variety of didactic material is offered for control (questions, exercises, tasks of varying degrees of complexity, tests with a choice of answers). exam (in particular, in the form of the Unified State Examination) or a competitive exam in chemistry for admission to universities of chemical and biomedical profile.