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The Facts On File Dictionary Of Chemistry, Fourth Edition by John Daintith

By John Daintith

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CO–. These form a class of organic compounds called ACID ANHYDRIDES (or acyl anhydrides). anhydrite /an-hÿ-drÿt/ See calcium sulfate. anhydrous /an-hÿ-drŭs/ Describing a substance that lacks moisture, or a salt with no water of crystallization. 5H2O, form white anhydrous copper(II) sulfate, CuSO4. Andrews’ experiment An investigation (1861) into the relationship between pressure and volume for a mass of carbon dioxide at constant temperature. The resulting isothermals showed clearly the existence of a critical point and led to greater understanding of the liquefaction of gases.

It occurs native and in the ores Bi2S3 and Bi2O3. The element does not react with oxygen or water under normal temperatures. It can be dissolved by concentrated nitric acid. Bismuth is widely used in alloys, especially low-melting alloys. The element has the property of expanding when it solidifies. Compounds of bismuth are used in cosmetics and medicines. p. p. d. n. m. 98037. biochemistry The study of chemical compounds and reactions occurring in living organisms. biodegradable /bÿ-oh-di-gray-dă-băl/ See bismuth(III) carbonate dioxide /dÿ-oks- pollution.

N. m. 92159. arsenic(III) chloride. arsenious oxide See arsenic(III) oxide. arsenite /ar-sĕ-nÿt/ See arsenate(III). arsine /ar-seen, ar-seen, -sin/ (arsenic hydride; AsH3) A poisonous colorless gas with an unpleasant smell. It decomposes to arsenic and hydrogen at 230°C. It is produced in the analysis for arsenic (Marsh’s test). artificial radioactivity Radioactivity induced by bombarding stable nuclei with high-energy particles. For example: 27 1 24 4 1 3 Al + 0n → 1 1Na + 2He represents the bombardment of aluminum with neutrons to produce an isotope of arsenic(III) chloride (arsenious chloride; 23 aryl group sodium.

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