Extraction of Aluminium Aluminium ore is called bauxite. Bauxite contains aluminium oxide‚ water‚ iron oxide and other impurities. The purified dry ore‚ called alumina‚ is aluminium oxide (Al2O3). The alumina must be molten for electrolysis to work‚ since the ions are not free to move in the solid state. Unfortunately‚ alumina has a high melting point (2040 °C) and it is not practical to do electrolysis at such a high temperature. In the middle of the nineteenth century it was found that alumina
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1 in vapour state sulphur partly exists as S2 molecule which has 2 unpaired electrons in the antibondind pi orbitals jus lyk oxygen and thus exhibits paramagnetism. 2 An interhalogen compound is a molecule whose atom contains two or more different halogen atoms (fluorine‚ chlorine‚ bromine‚ iodine or astatine). Most interhalogen compounds known are binary (composed of only two distinct elements). Their formulas are generally XYn‚ where n = 1‚ 3‚ 5 or 7‚ and X is the less electronegative
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increasingly complex models at all levels of biology. This paper shows the innovations in studying biology. It discusses the biological level of organization and it also describes the model that has seem to be found on the said level. It was also discussed on this paper that the complex models that was developed for the past few years must have the new methods and techniques to model it. The journal tackles the level of organization‚ multi-scale in modelling in biology‚ MD of ion channels and heart modelling
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has led to incomplete understanding and underestimation of the influence of social determinants on health. According to Link and Phelan (1995) the social determinants are the ’Fundamental causes’ of diseases. The social factors that are linked to illness include race‚ socioeconomic status‚ gender and stress. A fundamental cause involves access to resources that help individuals avoid risks whereas the individual-level risk factors like poor diet‚ cholesterol‚ exercise and high blood pressure can
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Lab 12: Meiosis kimberleigh Lewis Biology 1408-63400 Consider the Concepts Experiment: 1. A common misconception about meiosis appears when students identify which of the two divisions converts a diploid cell into two haploid cells. Meiosis I is the division immediately following DNA replication and replication does not occur again before meiosis II. However‚ meiosis I is the "reduction" division when a diploid cell forms two haploid cells. If the DNA duplicated before meiosis I‚ how
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Fundamentals of Macroeconomics In this essay I will describe the fundamentals of GDP‚ unemployment rate‚ inflation rate‚ and interest rate. Also I will be explaining how some common occurrences such as buying groceries‚ massive layoffs‚ and a decrease in taxes affect the government‚ businesses‚ and even you. Lets start with GDP. What is GDP you ask? GDP stands for Gross Domestic Product and represents the total market value‚ in dollars‚ of goods and services. There are 4 main components that
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Environmental Fundamentals Tara Howe ENV/100 Tolulope Awosika March 4th‚ 2013 Environmental Fundamentals In the year 1800 the human population on earth reached 1 billion. In 200 years‚ the population soared to 6 billion (Berg & Hager‚ Chapter 1‚ 2009). With industrialization and technologies developed in those 200 years‚ humans have been depleting the earth’s natural resources at an alarming rate. Environmental science is the branch of science concerned with
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JEET SCIENCE ACADEMY CHOWK AZAM (LAYYAH) TIME 2.5 Hr CHEMISTRY 1st YEAR CH # 1‚2‚9‚10 Marks: 85 G.Super . 1 Name…………………………………………...... Objective ROLL NO. ………………………………. Q.NO.1. Encircle the correct answer? (1×17=17) 1. Atoms of which one of the follelement have independent existance: (A) Flourine (B) Krypton (C ) Oxygen (D) Nitrogen 2.18g glucose is dissolved
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2007) (3) William Bonner‚ A (4) Lemieux‚ R. U.; Pavia‚ A. A. Solvation Effects on Conformational Equilibria. Studies Related to the Conformational Properties of 2-Methoxytetrahydropyran and Related Methyl Glycopyranosides. Canadian Journal of Chemistry 1969‚ 1966–1968. (5) M. L. Wolfrom‚ Donald R. Husted; the Beta to Alpha Conversion of Fully Acetylated Sugars by Alkali. J. Am. Chem. Soc.‚ 1937‚ 59 (2)‚ pp 364–365 (6) Perles‚ C (9) Spectral Database for Organic Compounds (SDBS); mass spectrum;
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This is important for the students to appreciate the knowledge of chemistry that is still new for themselves. Personally‚ I think that this chapter is an interesting chapter as it revealed the way of scientist produces the material around me. It also gives me new knowledge of the uses of chemical substances that I usually found in the laboratories. I hope‚ by learning this chapter‚ I will be more interested in learning chemistry as it will help me in the future. All the equations from this chapter
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