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[3] The alkali metal polysulfides arise by treatment of a solution of the sulfide with elemental sulfur, e.g. sodium sulfide to sodium polysulfide: S 2− + n S → S 2− n+1. In some cases, these anions have been obtained as organic salts, which are soluble in organic solvents. [4]
Table tennis rubber is a type of rubber used as covering on a racket in table tennis. [1] Modern table tennis rubber is usually composed of two layers: a layer of foam ("sponge") underneath and a layer of actual rubber on the surface. [2] There are four common types of table tennis rubbers: short pips, long pips, antispin, and inverted. [1]
The species S x 2−, called polysulfide anions, include disulfide (S 2 2−), trisulfide (S 3 2−), tetrasulfide (S 4 2−), and pentasulfide (S 5 2−). In principle, but not in practice, the chain lengths could be longer. [1] [2] The salts are dark red solids that dissolve in water to give highly alkaline and corrosive solutions.
Thiokol is a trade mark for various organic polysulfide polymers. [1] Thiokol polymers are used as an elastomer in seals and sealants.The distinction between the polymers first commercialized by the Thiokol Chemical Company and subsequent polysulfide materials is often unclear.
Table tennis racket Also known as a paddle or bat, is used by table tennis players. The table tennis racket is usually made from laminated wood covered with rubber on one or two sides depending on the player's grip. The USA generally uses the term "paddle" while Europeans and Asians use the term "bat" and the official ITTF term is "racket". [17]
Energy densities table Storage type Specific energy (MJ/kg) Energy density (MJ/L) Peak recovery efficiency % Practical recovery efficiency % Arbitrary Antimatter: 89,875,517,874: depends on density: Deuterium–tritium fusion: 576,000,000 [1] Uranium-235 fissile isotope: 144,000,000 [1] 1,500,000,000
Sweden's Truls Möregårdh pulled off the upset of the 2024 Paris Olympics after he defeated China's Wang Chuqin, the top-ranked table tennis player in the world, in men's singles action on Wednesday.
Na 2 S 4 + 2 ClC 3 H 6 Si(OEt) 3 → S 4 [C 3 H 6 Si(OEt) 3] 2 + 2 NaCl Bis(triethoxysilylpropyl)tetrasulfide is a bifunctional molecule in that it contains two kinds of reactive functional groups . The tetrasulfide group is a polysulfide , which means that it consists of a chain of sulfur atoms.