==Structure and bonding== Gaseous SO3 is a trigonal planar molecule of D3h symmetry, as predicted by VSEPR theory. SO3 belongs to the D3h point group In terms of electron-counting formalism, the sulfur atom has an oxidation state of +6 and a formal charge of +2. The Lewis structure consists of an S=O double bond and two S–O dative bonds without ...
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http://en.wikipedia.org/wiki/Sulfur_trioxide
(from the article `chemical compound`) ...oxyacids, which in turn yield hydronium ions (H3O+) in aqueous solution. There are two general statements that describe the behaviour of acidic ... modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. Sulfur dioxide and oxygen, ... ...
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http://www.britannica.com/eb/a-z/s/183
SO3 Molar mass: 80.0632
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http://www.convertunits.com/molarmass/Sulfur+Trioxide
SO3;forms sulfuric acid, H2SO4, by its reaction with water. ... Synonym: sulfuric oxide. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
Type: Term Definitions: 1. forms sulfuric acid, H
2SO
4, by its reaction with water. Synonyms: sulfuric oxide
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http://www.medilexicon.com/medicaldictionary.php?t=86644
an irritant, corrosive, low-melting solid, SO, obtained by the oxidation of sulfur dioxide, used as an intermediate in the manufacture of sulfuric acid. Also called
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https://www.infoplease.com/dictionary/sulfur-trioxide
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