The German physical chemist J. J. Loschmidt

The German physical chemist J. J. Loschmidt

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Caption: Portrait of the German physical chemist Johann Joseph Loschmidt (1821-1895). He was born in a village in what is now Czechoslovakia and studied in Prague and Vienna. In 1861 he published the book Chemical studies, I in which he introduced some new and correct ideas. He proposed that sugar is an ether-like compound, ozone is formed by three atoms of oxygen and that benzene has a cyclic structure. He also worked on the kinetic theory of gases and calculated the first accurate value for the size of air molecules. Loschmidt did pioneer experiments for the determination of the number of molecules of gas per cubic centimetre in order to find the Avogadro constant Na.

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Keywords: chemist, johann, loschmidt, portraits, surname l

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