dissolve 10 g cane sugar in a mixture of 20 mL glacial acetic acid. Boil mixture for 30 minutes. Add the phenylhydrazine solution through the condenser. Remove from the hot plate. Rinse with 5 mL of 1:1 mixture of water and glacial acetic acid to complete the transfer of phenylhydrazine. When a yellow solid emerges‚ swirl the mixture. Wrap a dry cloth around the flask. Cool to room temperature (preferably overnight). Filter off osazone. Press and drain it. Wash with a cold mixture of 10 mL each of
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part (i) (a)‚ the solid copper(II) nitrate is used to dissolve in a test tube filled with half distilled water. The solid copper(II) nitrate ionize in water to form copper(II) ions and nitrate ion. Hence‚ a blue solution is formed due to the blue copper(II) ion present in the solution. When excess solid is added‚ the solution will become saturated and do not allow any solid to dissolve‚ so excess solid will remain in the solution. This is shows that the equilibrium between solid and aqueous copper(II)
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Question 1 of 10 10.0/ 10.0 Points An ordinary cell thunderstorm is a A.thunderstorm that does not produce lightning or thunder. B.thunderstorm that has a tilted updraft and downdraft. C.scattered or isolated storm that is not severe. D.thunderstorm that does not produce hail. Answer Key: C Question 2 of 10 10.0/ 10.0 Points A group of thunderstorms which develop in a line one next to the other‚ each in a different stage of development‚ are called A.a thunderstorm cluster. B.a multicell
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The Boiling Frog Theory on Population Systems thinkers have given us a useful metaphor for a certain kind of human behavior in the phenomenon of the boiled frog. The phenomenon is this. If you drop a frog in a pot of boiling water‚ it will of course frantically try to clamber out. But if you place it gently in a pot of tepid water and turn the heat on low‚ it will float there quite placidly. As the water gradually heats up‚ the frog will sink into a tranquil stupor‚ exactly like one of us in a
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determine the support reactions when these reactions cannot be determined solely from the equations of equilibrium. To analyze the effects of thermal stresses. Copyright © 2011 Pearson Education South Asia Pte Ltd In-class Activities 1. 2. 3. 4. 5. 6. 7. 8. 9. Reading Quiz Applications Elastic deformation in axially loaded member Principle of superposition Compatibility conditions ‘Force method’ of analysis Thermal Stress Stress Concentration Concept Quiz Copyright © 2011 Pearson Education
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The problem of the ice melting The melting of polar ice is primarily caused by the increasing amount of gas emissions‚ mainly CO2 rising into the atmosphere (global warming) Global warming is the rise in the average temperature of Earth ’s atmosphere and oceans. Since the early 20th century‚ Earth ’s mean surface temperature has increased by about 0.8 °C. Scientists are more than 90% sure that it is caused by rising amount of concentrations of greenhouse gases‚ which are produced by human activities
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SOLID WASTE MANAGEMENT PRACTICES WITHIN INFORMAL SETTLEMENTS IN NAIROBI: A CASE STUDY OF MATHARE BY Rosemary Kwamboka TABLE OF CONTENTS ii LIST OF TABLES iii DEDICATION iv ACKNOWLEDGEMENTS v ABSTRACT vi 1.0 INTRODUCTION. 1 1.2 Background of the Study 4 1.3 Problem Statement. 5 1.4 Justification 6 1.5 The purpose of the study 6 1.6 Hypothesis 6 1.7 Specific objectives 6 2.0 LITERATURE REVIEW 7 3.0 METHODOLOGY 11 3.1 Area and population of Study 12 4.0 RESULTS 14 5.0 DISCUSSION
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Composition Period 7 May 29‚ 2014 Mr. Fields The Great Melting Pot A melting pot refers to the idea that there are multiple races in America. Some people argue that there is or may not be a melting pot in America due to the perception of American actions. After reading and listening to both sides of the argument and explanations as to if America is or is not a melting pot‚ I’ve came to the conclusion that America is not a melting pot. Instead we are more of a of salad. Heres why!
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ORGANIC CHEMISTRY LAB 2: Separation of Organic Liquid Mixtures Introduction: In this experiment‚ a mixture of two compounds‚ cyclohexane and toluene‚ was separated into fractions by the techniques of simple and fractional distillation. The individual fractions that were gathered from the distillation were analyzed using gas chromatography (GC) and used to compare the efficiencies of the two different distillation techniques. The ultimate goal of this experiment was to determine whether simple
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