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Inhalation: Gold causes irritation and also allergic reactions when inhaled. Electronics: Gold is used in corrosion free electrical connectors.Jewellery: Gold is alloyed with base metals to be used in jewelleries.It is used as money worldwide to store wealth in hoards. Monetary use: Gold is used as a substitute for money, a manner of indirect exchange.This is used in the cyanide process to extract metallic gold from ores. Relevance in Chemical and Related IndustriesĬyanide process: Gold is attacked with alkaline solution of potassium to form salt gold cyanide. It yields gold in very high purity, more than 99.999%. Gold gets dissolved by Aqua-Regia which is a 1:3 mixture of nitric acid and hydrochloric acid.Įxtraction & Refining: Gold is refined using the Wohlwill process which is based on Electrolysis.Gold does not react with most acids sulfuric, hydrochloric, hydrobromic, hydriodic, hydrofluoric acid, nitric acid, selenic acid.Gold is resistant to attack from ozone upto 100☌.Gold does not react to oxygen at any temperature.Gold compounds display oxidation states ranging from -1 to +5.Gold has only one stable isotope, gold-197.Gold is good conductor of electricity and heat.Gold is most malleable among all metals.For example, the atomic weight of oxygen is 16.00 amu, so its molar mass is 16.00 g/mol. Weve talked about it in other videos, you could view this 12. A table of atomic weights can be used to find the molar mass of elements (this information is often included in the periodic table). So if we first look at carbon, carbon, we see from this periodic table of elements, has a molar mass of 12.01 grams per mole. Get control of 2022 Track your food intake, exercise, sleep and meditation for free. Fortunately, this is not difficult, as the molar mass of an element is exactly the same as the atomic weight of that element. Gold has a slightly reddish-yellow appearance as opposed to other metals which appear silver or gray. Molar mass of Gold (Au) is 196.9665690 ± 0.0000040 g/mol.Seawater contains 4 grams of gold in about a million tonnes of water, and a efficient method of extraction of gold from seawater has not been developed yet. It is maily mined from veins and alluvial deposits. Gold is one of the few elements which are found in nature in elemental form.