"Experiments." . . . . "A selection of subject areas basic to general chemistry courses including states of matter, molecular structure, thermodynamics, electrochemistry, and acids and bases. Also provides examples from biochemistry, organic and inorganic chemistry, and environmental chemistry."@en . . "Selected demonstrations and animations"@en . . . . . . "The World of chemistry" . . . . . . . . . "World of chemistry demos/animations"@en . . . "QuĂ­mica." . .