What are mineral resources? Mineral resources are the natural resources which cannot be renewed. Examples of mineral resources Gold Salt Tin Limestone Iron ore Coal Iron Manganese Rubber Aluminium Marbles They are also used to produce useful things. Some of these useful things are: Soap Jewelleries e.g. chain bracelet e.t.c. Batteries And so on NAMES OF MINERAL RESOURCES‚ WHERE IT IS FOUND AND ITS USES. Limestone: Limestone is a sedimentary
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Department of Health DRVs (Dietary Reference Values) Nutrient | Recommended daily intake for 50+ years | Calcium (mg) | 700 | Phosphorus (mg) | 550 | Magnesium (mg) | 270 | Sodium (mg) | 1600 | Potassium (mg) | 3500 | Chloride (mg) | 2500 | Iron (mg) | 14.8 | Zinc (mg) | 9 | Copper (mg) | 1.2 | Selenium (μg) | 60 | Iodine (μg) | 140 | Vitamin A (μg) | 600 | Thiamin (mg) | 0.8 | Riboflavin (mg) | 1.1 | Niacin (mg) | 12 | Vitamin B6 (mg) | 1.2 | Vitamin B12 (μg) | 1.5 |
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Transition Metals 1a) The d-orbitals of a free transition metal atom or ion are degenerate (all have the same energy.) However‚ when transition metals form coordination complexes‚ the d-orbitals of the metal interact with the electron cloud of the ligands in such a manner that the d-orbitals become non-degenerate (not all having the same energy.) The way in which the orbitals are split into different energy levels is dependent on the geometry of the complex. Crystal field theory can be used to predict
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molten compounds. For aluminium‚ aluminium oxide (from the ore Bauxite) is used For Group 1 and 2 metals‚ the metal chlorides are usually used. Electrolysis is a very expensive process because of the cost of electrical energy. Carbon Zinc Iron Lead Zn Fe Pb Reduction of the metal oxides in a blast furnace. Carbon is used as the reducing agent. It is often in the form of coke (made from coal). Although this uses a lot of energy‚ this is cheaper than using electricity. Hydrogen
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MATALLIC MENIRALS ROLL NO: 07 Metallic Minerals On an auspicious day‚ sometime around a million years ago‚ a member of the Homo habilis species stood erect and walked steadily on his two feet and his two hands became totally free. A new species – Homo erectus—began its journey on a new evolutionary track. This great change took around four million years after his ancestors – the hominids — broke free from the lineage of apes and chimpanzees. But ‚ perhaps for the next seven to eight hundred
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reduced the ores to a mixture of copper and tin metal‚ which is bronze After the Bronze Age came the Iron Age. People discovered that a high temperature coal fire could be used for the extraction of iron from iron ore. The extraction of iron today is done in a blast furnace. The Iron Age began in Asia and Africa in 1‚100 B.C. and came to Britain in 500 B.C. In many ways‚ we are still in the Iron Age – take a look around. Metals above carbon in the reactivity series can only be extracted by electrolysis
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Prediction: *Using metal magnesium as an example illustration I. (Magnesium reacts with lead (II) nitrate) Mg + Pb(NO3)2 Pb + Mg(NO3)2 II. (Magnesium reacts with zinc nitrate) Mg + Zn(NO3)2 Zn + Mg(NO3)2 III. (Magnesium reacts with iron (III) nitrate) 3Mg + 2Fe(NO3)3 2Fe + 3Mg(NO3)2 Variables: The dependent variable for this investigation is the reactivity of each metal as measured by the occurring of chemical reactions between each combination of three solutions (0
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boiling water and metal sample in the pot (Ti(metal)) 95.0 C Temperature of cool water in the calorimeter prior to adding hot metal sample (Ti(water)) 17.0 C Maximum Temperature of water/metal in calorimeter after mixing (Tf) 50.0 C IRON METAL Pre-weighed Iron metal sample mass (mmetal) 50.0grams Temperature of boiling water and metal sample in the pot (Ti(metal)) 100.0 C Temperature of cool water in the calorimeter prior to adding hot metal sample (Ti(water)) 18.0 C Maximum Temperature of
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Questions 1. Use molar mass of iron to convert the mass of iron to moles. 85.65g/55.9g 1.534 moles of Iron were used 2. According to the law of conservation of mass‚ what is the mass of oxygen that reacts with the iron? 118.37g – 85.65g = 32.72 grams of Oxygen reacted with Iron 3. Calculate the number of moles of oxygen in the product. 32.72g/15.99g = 2.045 moles is the amount of moles of Oxygen produced 4. Use the ratio between the number of moles of iron and the number of moles of oxygen
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shields and milk was part of their staple diet. They used cattle in order to trade with other people for luxury items‚ food or iron tools. The early mixed farmers traded only with the Khoesan and they only traded iron supplements and crops‚ whereas the Late Mixed farmers had an extensive trading network‚ they traded with people from East Africa‚ Arabia‚ Persia‚ India and China‚
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