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The salt is known in anhydrous form as well as hydrates Na 2 HPO 4 ·nH 2 O, where n is 2, 7, 8, and 12. All are water-soluble white powders. The anhydrous salt is hygroscopic. [1] The pH of disodium hydrogen phosphate water solution is between 8.0 and 11.0, meaning it is moderately basic: HPO 2− 4 + H 2 O ⇌ H 2 PO − 4 + OH −
Coincides with ISO 3166-1 alpha-2 code. CL Sri Lanka: 1961 Formerly Ceylon. However, "SL" is being used on current driver licenses. CO Colombia: 1952 Coincides with ISO 3166-1 alpha-2 code. CR Costa Rica: 1956 Coincides with ISO 3166-1 alpha-2 code. CU [3] Cuba: 1930 [citation needed] Coincides with ISO 3166-1 alpha-2 code. CY Cyprus: 1932
Herbert George Wells (21 September 1866 – 13 August 1946) was an English writer. Prolific in many genres, he wrote more than fifty novels and dozens of short stories. His non-fiction output included works of social commentary, politics, history, popular science, satire, biography, and autobiography.
2.1 Independent states. 2.2 Dependent territories. 3 Notes. ... Nicholas Kao Se Tseien [bk] (born in China) M. 15 January 1897: 11 December 2007: 110 years, 330 days ...
Mercury(I) nitrate is an inorganic compound, a salt of mercury and nitric acid with the formula Hg 2 (NO 3) 2. A yellow solid, the compound is used as a precursor to other Hg 2 2+ complexes. The structure of the hydrate has been determined by X-ray crystallography. It consists of a [H 2 O-Hg-Hg-OH 2] 2+ center, with a Hg-Hg distance of 254 pm. [2]
Sodium peroxide is an inorganic compound with the formula Na 2 O 2.This yellowish solid is the product of sodium ignited in excess oxygen. [3] It is a strong base. This metal peroxide exists in several hydrates and peroxyhydrates including Na 2 O 2 ·2H 2 O 2 ·4H 2 O, Na 2 O 2 ·2H 2 O, Na 2 O 2 ·2H 2 O 2, and Na 2 O 2 ·8H 2 O. [4] The octahydrate, which is simple to prepare, is white, in ...
SK was a very high frequency search set for large ships. It furnished range and bearing of surface vessels and aircraft, and it could be used for control of interception. The set had both "A" and PPI scopes, provisions for operating with remote PPIs and for IFF connections, and built-in BL and BI antenn
Lucas numbers have L 1 = 1, L 2 = 3, and L n = L n−1 + L n−2. Primefree sequences use the Fibonacci recursion with other starting points to generate sequences in which all numbers are composite. Letting a number be a linear function (other than the sum) of the 2 preceding numbers. The Pell numbers have P n = 2P n−1 + P n−2.