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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

  3. Gold extraction - Wikipedia

    en.wikipedia.org/wiki/Gold_extraction

    Gold extraction is the extraction of gold from dilute ores using a combination of chemical processes. ... Over 10,000,000 pounds (4,500,000 kg) of mercury ...

  4. Indian units of measurement - Wikipedia

    en.wikipedia.org/wiki/Indian_units_of_measurement

    40 sers = 1 maund (= 34 kg 8 hg 3 dag 5g 9 dg 2.6 cg /34.835926 kilograms) 1 rattī = 1.75 grains (= 0.11339825 gram/113 milligrams 398 1/4 micrograms 4 attograms ) (1 grain = 0.064799 gram) From 1833 the rupee and tolā weight was fixed at 180 grains, i.e. 11.66382 grams. Hence the weight of 1 maund increased to 37.324224 kilogram. [3]

  5. Gold gram - Wikipedia

    en.wikipedia.org/wiki/Gold_gram

    This allows gold holdings and transfers to take place in tiny fractions of a gram (equivalent to a few cents). A possible source of confusion is that gold is often priced on the open market in the more traditional troy ounce (one troy ounce is exactly 31.1034768 grams, which is larger than the avoirdupois ounce generally in use in the United ...

  6. Mohur - Wikipedia

    en.wikipedia.org/wiki/Mohur

    Gold mohurs issued by the Mughal Empire, Imperial India, the British East India Company or the British India are valuable collector items and sell in auctions for high prices. The double mohur (minted between 1835 and 1918) with a value of 30 rupees is the highest denomination circulating coin issued till date.

  7. Sovereign Gold Bond - Wikipedia

    en.wikipedia.org/wiki/Sovereign_Gold_Bond

    It was open from January 18 to January 22, 2016. The bonds initially paid 2.75% interest per year, later reduced to 2.5% per year. [7] [2] The bonds were sold through banks, post offices and through online securities brokers which would allow investors to hold the bonds in demat form. [8] [9] Narendra Modi addressing at the launch of the Gold ...

  8. Steam accumulator - Wikipedia

    en.wikipedia.org/wiki/Steam_accumulator

    Steam can be drawn off as required, either for driving a steam turbine or for process purposes (e.g. in chemical engineering), by opening a steam valve on top of the drum. . The pressure in the drum will fall but the reduced pressure causes more water to boil and the accumulator can go on supplying steam (while gradually reducing pressure and temperature) for some time before it has to be re-char

  9. Steam reforming - Wikipedia

    en.wikipedia.org/wiki/Steam_reforming

    Steam reforming or steam methane reforming (SMR) is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water. Commonly, natural gas is the feedstock. The main purpose of this technology is often hydrogen production , although syngas has multiple other uses such as production of ammonia or methanol .