from its ores. Generally‚ copper is extracted using the Pyrometallurgical method (also known as smelting)‚ which allows us to separate copper from its sulfide and oxide ores; the other method‚ called the Hydrometallurgical method (also known as solvent extraction or electrowinning - SX/EW)‚ allows us to also separate copper from its oxide ores. Although this method is more cost effective‚ it only accounts for a very limited amount of the world’s copper production as its environmental impact is much
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Electricity from Natural Gas Natural gas is a fossil fuel formed when layers of buried plants and animals are exposed to intense heat and pressure over thousands of years. The energy that the plants and animals originally obtained from the sun is stored in the form of carbon in natural gas. Natural gas is combusted to generate electricity‚ enabling this stored energy to be transformed into usable power. Natural gas is a nonrenewable resource because it cannot be replenished on a human time frame
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all questions from this Section Question 1 (a) Select from the list the gas that matches the description given in each case: [ammonia‚ ethane‚ hydrogen chloride‚ hydrogen sulphide‚ ethyne] (i) This gas is used as a reducing agent in reducing copper oxide to copper. (ii) This gas produces dense white fumes with ammonia gas. (iii) This gas is used for welding purposes. (iv) This gas is also a saturated hydrocarbon. (v) This gas has a characteristic rotten egg smell. [5] (b) Choose the most appropriate
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to be approximately 6.6 billion tons. These substances‚ which arent naturally part of the atmosphere‚ are called pollutants. Over ninety percent of all air pollutants can be divided up into five categories: carbon monoxide‚ nitrogen oxides‚ hydrocarbons‚ sulfur oxides and suspended particulate matter. Mass is only one way of categorizing pollutants. Substances can also be looked at from an effect stand point. For example‚ carbon monoxide (CO) comprises 56% of all air pollutants when looked at in terms
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Smoke From Wikipedia‚ the free encyclopedia For other uses‚ see Smoke (disambiguation). Smoke from a bee smoker‚ used inbeekeeping the smoke of burning tungsten in alightbulb Smoke is a collection of airborne solid and liquid particulates and gases[1] emitted when a material undergoes combustion or pyrolysis‚ together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-product of fires (including stoves‚ candles‚ oil lamps‚ and fireplaces)
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Nitric Oxide (NO) is released into the atmosphere when any type of fuel is burned. This includes byproducts of internal combustion engines. Nitrous Oxide (N2O) is released into the atmosphere through bacteria in livestock waste and commercial fertilizers applied to the soil. Removing nitrogen from the Earth’s crust and soil when
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and toxic air contaminants. Ozone is formed when hydrocarbons and nitrogen oxide react in sunlight. Therefore‚ ozone is at its peak during hot summer days. Exposure to high levels of ozone can have serious consequences on your health. It can cause respiratory disease‚ loss of pulmonary elasticity‚ and premature aging of our lungs. Next‚ is acid rain‚ which occurs in the atmosphere in the form of sulfur and nitrogen oxide. These pollutants can have serious damaging affects on aquatic‚ forest and
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most metals are too reactive to exist on their own like aluminium‚ which has to be extracted using a method called electrolysis. And some moderately reactive metals that are in the middle of the reactivity series can be extracted using reduction of oxides like iron. Gold is not found in a mixture or
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E. Biology 227 03/28/2014 Food and health How important is your health? Would you consider yourself a health conscious type of person‚ or perhaps a person who eats anything that is served? Now and days obesity is a major problem in our society‚ many factors may contribute to this problem but mostly is due to the food that we consume. Therefore‚ I would like to discuss the role of diet in our daily lifestyles‚ also some differences between a plant based diets versus a diet
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the Group IA of the long form of the Modern Periodic Table‚ viz. Lithium (Li)‚ Sodium (Na)‚ Potassium (K)‚ Rubidium (Rb)‚ Cesium (Cs) and Francium (Fr). Fr is a radioactive element. These elements are called so because they form strongly alkaline oxides and hydroxides. Electronic Configuration of Alkali Metals Each of the alkali metals has one electron in their outermost (valence) shell‚ which is just outside an inert gas core. Element Atomic No. Electronic Structure Valence Shell Electron
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