sentences:  The Karlsruhe Congress was called so that European chemists could discuss matters of chemical nomenclature, notation, and atomic weights.The organization, invitation, and sponsorship of the conference were handled by August Kekulé, Adolphe Wurtz, and Karl Weltzien.As an example of the problems facing the delegates, Kekulé's "Lehrbuch der Organischen Chemie" gave nineteen different formulas used by chemists for acetic acid, as shown in the figure on this page.