The New Encyclopaedia Britannica: Macropaedia (19 v.)Encyclopaedia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 114
... substances hydrogen and oxygen ; these two substances , however , are elements because they cannot be decomposed into simpler sub- stances by any known chemical process . Most samples of naturally occurring matter are physical mixtures ...
... substances hydrogen and oxygen ; these two substances , however , are elements because they cannot be decomposed into simpler sub- stances by any known chemical process . Most samples of naturally occurring matter are physical mixtures ...
Page 166
... substance but a complex array of many substances . Even a single fibre of wood is a com- plex system of many compounds . The number of sub- stances possible is almost without limit . A few common substances are water ( H2O ) ; octane ...
... substance but a complex array of many substances . Even a single fibre of wood is a com- plex system of many compounds . The number of sub- stances possible is almost without limit . A few common substances are water ( H2O ) ; octane ...
Page 171
... substances and that these substances have marked differences in melting points , vapour pressures ( volatilities ) , or solubilities . When the mixture contains substances having closely similar prop- erties , the problem becomes more ...
... substances and that these substances have marked differences in melting points , vapour pressures ( volatilities ) , or solubilities . When the mixture contains substances having closely similar prop- erties , the problem becomes more ...
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Common terms and phrases
acid activity administration ammonia army atomic orbitals became benzene bonds Buddhist called carbon atoms cells central centre Ceylon Ch'in Chaetognatha Charadriiformes Charles Chaucer chemical bonds chemical reactions chemistry chemoreception Chess Chicago children's literature Chile China Chinese chloride Chou common complex compounds covalent covalent bonds cultural disease drugs dynasty early economic electrons elements emperor energy example fluorine groups Hopeh hydrogen important increased industry insects involved ions king known land large number Lo-yang major mass materials ment metal methods molecular molecules nitrogen northern nucleus occur officials orbitals organic oxide oxygen party percent period political population provinces quartets reactants receptors region reign result river separation Shang shell Sinhalese social sodium sodium chloride southern species structure substances sulfonamide sulfur sulfuric acid Szechwan T'ang Taoist temperature tion trans Tsung turtles Yangtze