Presents the spectra of the flames of three gaseous mixtures, together with analyses of the rotational, vibrational, and electronic contributions to the spectra. (MLH)

Discusses the fact that although most historians of science attribute the formulation of the law of conservation of matter in chemical reactions to Antoine Lavoisier at the end of the eighteenth century, several earlier researchers had already assumed this law in their work. These researchers include Joseph Black, Henry Cavendish, M. V. Lomonosov,…

Describes an undergraduate physical chemistry experiment in which an azeotropic mixture is studied using the vapor pressures of the components as functions of temperature and the azeotropic composition and temperature at one pressure. Discusses in detail the mathematical treatment of obtained thermodynamic data. (MLH)

Describes a theory concerning the formation of soap films which enables this technique to be applied to problems requiring the minimization of the surface area between fixed boundaries. (Author/CP)

Describes the planning and implementation of a fundamental college chemistry course for non-science majors. The course was planned and taught by undergraduate chemistry majors. (MLH)

Describes an undergraduate physical chemistry experiment in which the acid catalyzed hydrolysis of sucrose is used to determine the catalytic coefficient of the hydronium ion, the catalyst in this reaction. (MLH)

Discusses difficulties encountered in the determination of the thermal conductivity of a gas. Provides analyses of one particular set of data. (CP)

Reports on a study designed to make within and between comparisons of the ratings students give to their lecturers and laboratory instructors in introductory college chemistry. In addition, the evaluation instrument used was designed to assess the degree to which the format of the questions leads to differential ratings. (Author/GS)

A survey of 45 public high schools in Florida shows an extremely low enrollment of black students in science courses. Suggests that vague career aspirations, parental and counselor roles, and perhaps a certain degree of racism account for the enrollment figures. (MLH)

Presents a science problem, involving the inhalation of hydrogen cyanide, that is used as an extra credit acitvity for chemistry students. (GS)

Discusses the teaching of the concept of electronically equivalent groups by comparing transition metal and nonmetal groups that have the same electronic requirements. (MLH)

Describes an undergraduate biochemistry experiment that utilizes gel electrophoresis of a crude extract and the partially purified gel filtrate. (MLH)

Explains why sucrose does not reduce Fehling's or Benedict's solution while maltose, fructose and glucose do. (LS)