![]() ![]() Water, H 2O, and silica, SiO 2, main component of the sand, are among the more abundant binary oxygen compounds. ![]() Nearly every chemical, apart from the inert gasses, bind with oxygen to form compounds. The water in rivers and lakes needs to have a regular supply of oxygen, for when this gets depleted the water will no longer support fish and other aquatic species. Oxygen is fairly soluble in water, which makes life in rivers, lakes and oceans possible. The oxygen in the Earth's atmosphere comes from the photosyntesis of plants, and has built up in a long time as they utilised the abundant supply of carbon dioxide in the early atmosphere and released oxygen. Oxygen gas makes up a fifth of the atmosphere, amounting to more than a million billion tonnes. The crust of earth is composed mainly of silicon-oxygen minerals, and many other elements are there as their oxides. This oxygen is stored not as an oxygen gas but as the chemical sodium chlorate. ![]() The main applications of oxygen in order of importance are: 1) melting, refining and manufacture of steel and other metals 2) manufacture of chemicals by controlled oxidation 3) rocket propulsion 4) medical and biological life support 5) mining, production and manufacture of stone and glass products.Īn emergency supply of oxygen automatically becomes available for the passenger in an aircraft when the pressure drop suddently. Oxygen can be separated from air by fractionated liquefaction and distillation. It is moderately soluble in water (30 cm 3 per 1 liter of water dissolve) at 20 Celsius. Oxygen is reactive and will form oxides with all other elements except helium, neon, argon and krypton. Liquid oxygen is also slightly paramagnetic. Oxygen is part of a small group of gasses literally paramagnetic, and it’s the most paramagnetic of all. In normal conditions oxygen is a colourless, odourless and insipid gas it condensates in a light blue liquid. Non-combined gaseous oxygen normally exists in form of diatomic molecules, O 2, but it also exists in triatomic form, O 3, named ozone. Nearly one fifth (in volume) of the air is oxygen. It’s the most abundant element in The Earth’s crust. It’s of great interest because it’s the essential element in the respiratory processes of most of the living cells and in combustion processes. Gaseous chemical element, symbol: O, atomic number: 8 and atomic weight 15,9994. Oxygen - O Chemical properties of oxygen - Health effects of oxygen - Environmental effects of oxygen
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