1) A hypothesis is 1) an educated guess based on observations‚ that is testable 2) Consider the following statement: "If all vertebrates have backbones‚ and turtles are vertebrates‚ then turtles have backbones." This statement is an example of 2) hypothesis 3) Which of the following statements about evolution is true? 3) 4) Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least inclusive to most inclusive? 4) 5) What is the difference
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Experiment 12: Isopentyl Acetate 19 October 2012 Introduction: The purpose of this experiment is to prepare isopentyl acetate by direct esterification of acetic acid with isopentyl alcohol. After refluxing there is an isolation procedure where excess acetic acid and remaining isopentyl alcohol are easily removed by extraction with sodium bicarbonate and water. The ester is then purified by simple distillation and the IR is then obtained. Techniques and equipment used throughout the experiment
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GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key IInstructions The final examination will be weighted as follows Modules 1–3 Modules 4–6 The format of the examination will be as follows: Part A: Fill-in-the-Blanks Part B: Multiple Choice Part C: Short Answer Total Marks Include units with all answers as required. Useful Information You will need the following in order to complete this examination: n n n n 15–20% 80–85%
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School of Chemistry University of KwaZulu-Natal Westville Campus Chemistry 220 Organic Chemistry 2012 LABORATORY MANUAL It is a legal requirement that are worn in this room at all times. Sunglasses (normal or prescription) are NOT to be worn as a substitute for safety glasses. Prescription glasses (except sunglasses) are acceptable PROVIDED THEY COVER THE EYES COMPLETELY. Some types of contact lens should not be worn in the laboratory. Check with your lens supplier. All shoes MUST be
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Photochemical Synthesis of Benzopinacol and its Acid-Catalyzed Rerrangement Product Benzopinacolone M.E.G. Balita Institute of Chemistry‚ University of Philippines‚ Diliman‚ Quezon City Date Performed: February 18‚ 2011 Date Submitted: March 4‚ 2011 Abstract In this experiment it is aimed to synthesize benzopinacol through photochemical reaction of benzophenone and‚ benzopinacolone via acid-catalyzed rearrangement of benzopinacol. In this experiment‚ mixture of benzophenone‚ isopropyl
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Literature Survey 2. Literature Survey Literature survey indicated 135 possible routes for the synthesis of 2-Aminobiphenyl. It must be noted that all routes available were lab-scale and no patents for the desired compound were available. Also‚ majority of these synthesis routes gave extremely low yields of our desired product and produced a number of other by-products in higher yields. Therefore‚ only the pathways giving significant yields of the desired product have been listed below. i. Suzuki
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Carly Bolyard Chem 2020 Experiment Performed: 9/17/2014-9/24/2014 Lab Partner: Erika Breeden Synthesis of 1‚4-Di-t-Buytl-2‚5-Dimethoxybenzene via Friedel-Crafts Alkylation Title: Synthesis of 1‚4-Di-t-buytl-2‚5-dimethoxybenzene via Friedel-Crafts Alkylation Introduction: Friedel-Crafts alkylation of benzene (and substituted benzenes) involves substituting a hydrogen atom on a benzene ring with an alkyl group. In the reaction a new alkyl group becomes bonded to a carbon atom of
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Edexel IGCSE Chemistry Revision Notes IGCSE Chemistry Triple Award Revision Guide Topic Introduction to chemistry Atomic Structure Structure and Bonding – Ionic Bonding Structure and Bonding – Covalent and Metallic Bonding Organic Chemistry - Alkanes Organic Chemistry – Alkenes / Addition Polymerisation Organic Chemistry – Alcohols / Condensation Polymerisation Calculations Periodic Table Reactivity Series and Metal Extraction Electrolysis Energetics Acids‚ Bases‚ Salts and Neutralisation
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iIsolation of Chlorophylls and Beta Carotene from Plant Leaves Wang Haina A0133901R 1. Aim 1. To isolate chlorophyll and beta carotene from plant leaves using column chromatography. 2. To qualitatively characterise the pigments with UV-vis spectroscopy and TLC. 2. Results and discussion Isolation of beta carotene and chlorophylls by column chromatography Upon the loading of S1 (the extract of the plant leaves in hexane)‚ a yellow band appeared at the top part of the silica column immediately
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chitin starch glycogen Purple pages F23 cellulose BIO 1140 – SLIDE 2 http://www.mpie.de/index.php?id=2957 Monosaccharides CnH2nOn n = 3 to 7 Trioses‚ pentoses and hexoses most common Linear vs ring configuration Asymmetrical C isomers glyceraldehyde ribose D-glucose -D-glucose ß-D-glucose Fig. 2.13 BIO 1140 – SLIDE 3 Purple pages F20-21 Polysaccharides Glycosidic bond C1 to C4 vs ß starch glycogen Purple pages F22-23 cellulose chitin NH BIO 1140 – SLIDE
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