DENSITIES AND ELECTRICAL CONDUCTIVITIES OF COPPER(II) CHLORIDE SOLUTIONS IN DIMETHYL SULFOXIDE AND WATER–DIMETHYL SULFOXIDE EQUIMOLAR MIXTURE AT THE TEMPERATURES 298.15 K, 308.15 K AND 318.15 K. Proceedings of the YSU B: Chemical and Biological Sciences, v. 53, n. 1 (248), p. 3–9, 15 Apr.2019.