source of wild-natural pearls Pearl structure Most of the gemstone have a mineral and inorganic structure‚ but Since pearls structure comes from the organism‚ pearls originally have an organic structure. Inorganic gems are crystalline‚ while organic gems are non-crystalline so described as amorphous‚ or without the crystalline form. In the nature‚ pearls are found in black‚ white‚ pink and shades of other colors. Pearls have a distinctive concentric structure‚ and they have a specific gravity about
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Chem Exam - ‘98 1. Solve the following problem related to the solubility equilibria of some metal hydroxides in aqueous solution. (a) The solubility of Cu(OH)2(s) is 1.72 x10–6 g/100. mL of solution at 25° C. (i) Write the balanced chemical equation for the dissociation of Cu(OH)2(s) in aqueous solution. Cu(OH)2 Cu 2+ + 2 OH – (ii) Calculate the solubility (in mol/L) of Cu(OH)2 at 25 °C. (1.72 x10–6 g/0.100 L)(1 mol/97.5 g) = 1.76 x10–7 mol/L (iii) Calculate
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Chemical Formulas Review: Nomenclature and Formula Writing Naming Simple Compounds There are four naming systems you should familiarize yourself with to succeed on the SAT II Chemistry exam. The trick is recognizing which naming system to use. Here are the guidelines: * If the compound starts with H‚ it is an acid. Use the naming acids rules. * If the compound starts with C and contains quite a few H’s and perhaps some O’s‚ it is organic. Use the naming organic compounds rules. *
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Chemical Reactions and their Classifications 26 October 2012 Abstract: Ordinary laboratory ware was used to determine how many of what type of chemical reactions occurred. This yielded three decomposition reactions‚ four substitution reactions‚ and three metathesis reactions. Introduction There are many different types of chemical reactions in the study of chemistry; A composition reaction (also known as synthesis) is defined as the reaction that occurs when two single compounds combine in
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Victoria Chemicals PLC: The Merseyside Project Prepared by Gabriela Tiffany Executive Summary The purpose of this report is to provide an understanding and analysis regarding the project proposed. The report starts with a brief overview of the company and the project proposal. This report then continues with assessing the concerns of Transport Division‚ ICG Sales and Marketing Department‚ and Treasury Staff. Furthermore‚ this proposal will also evaluate the recommendation from the Assistant Plant
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Introduction Capital structure (CS) is one of the most important aspects of the Financial Management of any organization. It aims is to identify and implement the best capital structure proportion possible that suits the organizations needs and objectives. An optimal Capital structure boosts the prosperity of the company in the long run and reduces the risk. CS is a mixture of a company ’s current and non current debt‚ common and preferred equity. It ’s the way a company finances its functions
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Naphthalene Ball in Water Objective: In this experiment‚ we will determine if the naphthalene can be dissolve in water or not. And what will happen in the filter paper if we stick it in the funnel and let it absorbed the fumes in the boiling water with powdered naphthalene. Materials: Evaporating dish Spatula Watch Glass Filter paper Tripod Mortar and pestle Alcohol Lamp Funnel Beaker Data: Naphthalene 1. white crystalline compound 2. has a strong odor 3. round
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Chemical reactions are a part of everyday lives. Whether it is the burning of propane at a kitchen stove‚ or washing detergent reacting with dirt stains‚ chemical reactions are useful tools that have widespread applications. With so many reactions assisting our everyday activities‚ it is important that ways to optimise reaction rates are investigated. “Reaction rate‚ the speed at which a chemical reaction proceeds… may be defined in terms of the amounts of the reactants consumed or products formed
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BPA‚ is a carbon based synthetic compound belonging to the group of diphenylmethane derivatives and bisphenols. The chemical formula for BPA is (CH3)2C(C6H4OH)2. BPA was first synthesized in 1891‚ and was recognized as a synthetic estrogen in the 1930s. The Food and Drug Administration (FDA) approved the use of BPA in 1960 to manufacture certain plastics and epoxy resins. This chemical compound of synthetic estrogen is used to harden plastics and resins‚ while keeping them lightweight. BPA is found
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