COORDINATION COMPOUNDS: * FLEXIDENTATE CHARACTER OF POLYDENTATE LIGANDS; * Poly dentate ligands have flexi dentate character in the sense that all donors atoms may not form coordinate bonds with the central metal atom or ion. For example; EDTA which is the hexa dentate ligand also acts as tetra dentate or penta dentate in certain complexes. Similarly sulphate ion‚ which is a bi dentate ligand‚ also acts as a mono dentate ligand in certain complexes‚ e.g. in [Co(SO4)(NH3)5]Cl. * LABILE
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2009 ICAS G paper ANSWERS 1. A 2. A 3. C 4. D 5. B 6. C 7. A 8. C 9. A (wind energy is renewable) 10. B 11. B 12. D 13. D 14. B 15. B 16. B 17. B? 18. B (the average change in mass is greatest) 19. A 20. A 21. C (because they are reflectors they need to be under the water to reflect the sunlight back up to to the water) 22. B? 23. C 24. C (the amount of liver changes but the other variables remain the same) 25. A (the temperature changes but the other variables remain the same) 26. B 27. C (ie‚
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Unit 1: Introduction to Biochemistry Lesson 1-4: Key Question How many electrons does Mg2+ have? (1 mark) Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium
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The element‚ magnesium is unlike most because of the way it is composed‚ and many do not know what Magnesium is. The element has unique physical properties‚ a rich history that stretches back to the 17th century‚ and lots of sophisticated uses that are used in your everyday life‚ and vital to your health as a human. Magnesium’s properties are‚ in a way‚ very unique. On the periodic table Magnesium is found in the Alkaline Earth metal group. The structure of the atom consists of twelve protons‚
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The overall purpose of the lab is the understanding of the process and goals of the scientific method. This lab illustrates that this method is very useful to answer a question or address a problem base on observations and the available information. Hypothesis: There are more red marbles than black marbles. We were able to address our hypothesis with the data collected because 26.32% of the marbles are red and just 14.47% are black. Also‚ the percentage of red marbles is the biggest in comparison
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DUBAI ALUMINUM COMPANY LIMITED – CASE STUDY An HRM group assignment By Job James Submitted to Dr. Tariq. Job James | 7012 – 310016/ 1033887 | Contents Facts of the case-study 3 Stating the problem: 3 Areas of Consideration: 4 Objectives: 4 Alternate Courses of Actions: 5 Alternative Solution 1 – Adopting diversity-friendly HR Policies: 5 Advantages & its supporting theory: 5 Disadvantages & its supporting theory: 6 Alternative Solution 2 – Educate the benefit
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Manufacturing Processes and Engineering Materials Used in Automotive Engine Blocks by Hieu Nguyen School of Engineering Grand Valley State University Term Paper EGR250 – Materials Science and Engineering Section B Instructor: Dr. P. N. Anyalebechi April 8‚ 2005 Manufacturing Processes and Engineering Materials Used in Automotive Engine Blocks Abstract Until recently‚ cast iron and aluminum alloys have been the preferential materials used to manufacture most diesel
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LABORATORY REPORT 4 PREPARATION OF ALUM FROM ALUMINUM METAL Huy Nguyen October 2nd‚ 2012 The objective of the laboratory is to synthesize alum (KAl(SO4)2.xH2O) from aluminum powder and to determine the proportion of water in the alum crystals. Alum is a product from the reaction between potassium hydroxide and sulfuric acid. The reaction include several steps‚ as followed: Aluminum powder reacts with potassium hydroxide to generate Al(OH)4- ions and release hydrogen. 2 Al(s) + 2 KOH(aq)
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In recent years‚ iron and steel material iron powder of prices rise‚ the choice of sand iron profit‚ increased profits. Therefore‚ special machinery and river sand processing equipment‚ magnetic separation machine series jaw crusher manufacturer processing equipment already in many areas the national promotion. At the same time‚ they are inseparable from magnetic separation machine. The milling equipments how to choose from sand iron? These mineral processing equipment general working principle:
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We recommend you do not build this new Greenfield primary aluminum smelter in South Africa. In order to achieve a 15% ROI on your investment‚ you require a long-term average price of $1500 for aluminum. We have estimated that demand for primary aluminum in 5 years will be at $20bn‚ which will support a market price of around $1490. This heavily builds on the assumption that aluminum inventories will be zero by that time‚ which depends on a successful implementation of the international Memorandum
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