contact sulphuric acid
11Laboratory glassware — Three beakers, a conical flask, a graduated cylinder and a volumetric flask …
12Creosote — For other uses, see Creosote (disambiguation). Creosote is the portion of chemical products obtained by the distillation of a tar that remains heavier than water, notably useful for its anti septic and preservative properties.[1] It is produced… …
13Alien (Alien franchise) — infobox fictional creature name = Alien caption = A human spawned alien warrior as it appeared in Alien vs. Predator . classification = Alien lifeform first = Alien last = created by = Dan O Bannon Ronald Shusett designed by = H. R. Giger… …
14History of the battery — could only function in a certain orientation. Many used glass jars to hold their components, which made them fragile. These practical flaws made them unsuitable for portable appliances. Near the end of the 19th century, the invention of dry cell… …
15Edmund Davy — FRS (1785 5 Nov1857)Christopher F. Lindsey, ‘Davy, Edmund (1785–1857)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/7311 accessed 6 April 2008] ] was a professor of Chemistry at… …
16Drain cleaner — A drain cleaner is a consumer product or device that unblocks sewer pipes or helps to prevent the occurrence of clogged drains; the term may also refer to the individual who performs the activity. Drain cleaners can be classified in three… …
17Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… …
18Niobium — zirconium ← niobium → molybdenum V ↑ Nb ↓ Ta …
19Chondroitin sulfate — Chemical structure of one unit in a chondroitin sulfate chain. Chondroitin 4 sulfate: R1 = H; R2 = SO3H; R3 = H. Chondroitin 6 sulfate: R1 = SO3H; R2, R3 = H …
20Iodine — (IPAEng|ˈaɪədaɪn, ˈaɪədɪn, or IPA|/ˈaɪədiːn/; from el. ιώδης iodes violet ), is a chemical element that has the symbol I and atomic number 53. Naturally occurring iodine is a single isotope with 74 neutrons. Chemically, iodine is the least… …
