IGCSE PRE-AICE CHEMISTRY 0620 OFFICIAL STUDY GUIDE Notes: To avoid any confusion concerning the symbol for litre‚ dm3 will be used in place of l or litre.Valence electrons are known as valency electrons for this test. Nature of Matter The states of matter are solid‚ liquid‚ and gas‚ in respective order of kinetic energy. State of Matter | Definite Volume | Definite Shape | Solid | Yes | Yes | Liquid | Yes | No | Gas | No | No | Diffusion:
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Molecule Electron diagram F S F F Cl PCl5 Cl Cl P Cl Cl SF6 F F F S F F F 2 The following table summarizes the relationship between the arrangement of electron pairs around the central atom of a molecule or polyatomic ion and the shape of the species. Total number of electron pairs* in the outermost shell of the central atom of a molecule or polyatomic ion 2 linear Arrangement of electron pairs* Shape of the molecule or polyatomic ion Example(s) B A linear B B
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acids to produce salts and water. Bases conduct electric current. 2. a. Distinguish between binary acids and oxyacids in terms of their component elements and the systems used in naming them. b. Give three examples of each type of acid. - Binary acids contain H atoms (which are released as H+ when the acid is dissolved) and a simple anion such as Cl- or Br - or S2-‚ while oxyacids contain H atoms and an oxyanion such as SO42- or NO3-. Two examples of binary are hydrochloric and hydrofluoric acid
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The Effect of pH Level of a Liquid on the Rate of Corrosion of Copper wire In this experiment‚ I will be testing the corrosion rate of copper wire after leaving them in different liquids with different pH levels. By doing so I will be able to determine which pH level corrodes copper the fastest. I will conduct this experiment by pouring 250mL of different liquids with different pH levels in cups‚ followed by an iron strip placed into the cup. A stopwatch will be timing how long it takes the iron
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Mining Assignment #4 By Siyuan Wei‚ Yifei Pei‚ Amrita Sur and Clinton Huynh Mineral: Copper Dip: 60 Depth: 650m Location/Terrain: Under River Chosen Mining Method: Sublevel Stoping - Sublevel Stoping is designed for mineral deposits which consists of fairly stable rocks and have a steep dip. - This method is quite commonly used to mine copper at varies sites around Australia. For example‚ Mount Isa‚ Olympic Dam etc… Mining Process - Sublevels are created within the solid
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Copper toxicity From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Copper toxicity | Classification and external resources | A Kayser-Fleischer ring‚ copper deposits found in the cornea‚ is an indication the body is not metabolizing copper properly. | ICD-10 | T56.4 | ICD-9 | 985.8 | MedlinePlus | 002496 | Copper toxicity refers to the consequences of an excess of copper in the body. Copper toxicity can occur from eating acid foods cooked in uncoated copper cookware
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I) INTRODUCTION * Industrial Chemistry deals with the preparation of products from raw materials through the agency of chemical change * Chemistry is important to Industry by: * Regulating manufacturing processes * Quality Control * Research and Development * Sources of raw materials from the natural environment 1) Lithosphere –Earth’s Crust 2) Hydrosphere – Marine and Oceanic Environment 3) Atmosphere – Air 4) Plants – Biosphere * Classification of Natural
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anticipation of customer orders and therefore they rely on forecasting. This forecast is used to predict future demand‚ which determines the quantity of each component needed to assemble a PC and the plant capacity required to perform the assembly. 2. How could Dell use collaborative forecasting with its suppliers to improve its supply chain? Collaborative forecasting requires all supply chain partners to share information regarding parameters that might affect demand‚ such as the timing and magnitude
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you. Rinse both tubes and return to the test tube holder. Leave all items as you found them at your station. The data we recorded was that bubbles formed on pencil led‚ and one of the batteries anodes turned slightly yellow. The reaction was H20- 2H (g) + O2. The next station was at number four. The procedure was to hook one mechanical pencil lead to each of the
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *6145201818* CHEMISTRY Paper 3 (Extended) Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
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