Determination of the Rate Constant for a Chemical Reaction Department of Chemistry Abstract This experiment was performed to determine the rate constant k‚ for hydrolysis of tertiary butyl chloride to tertiary butanol. The solvent system for this reaction is 45% isopropyl alcohol and 55% water. The rate of hydrolysis of t-butyl chloride is measured by the decrease in the concentration of this reagent with time. The rate of decomposition of t-butyl chloride must be equal to the rate of formation
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Does caffeine affect heart rate? Background Information: Caffeine is a bitter white crystalline xanthine alkaloid that acts as a psychoactive stimulant drug. A German chemist‚ Friedrich Ferdinand Runge‚ discovered it in 1819. Plants produce caffeine as an insecticide. It is found in varying quantities in the beans‚ leaves‚ and fruit of over 60 plants‚ where it acts as a natural pesticide that paralyses and kills certain insects feeding on the plants. Cocoa in South America‚ coffee in Africa
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The graph shows the time it takes for the cross on the bottom of the beaker while the reaction is recurring to disappear. As it can be seen in the graph‚ the higher the temperature the shorter the time is for the Sulphur to be created. If it is looked as one continuous line‚ the first part of the trend line shows a steep‚ straight and constant decrease; then the 2nd part is not as steep and has a more gradual decline. Moreover‚ it shows how a reaction at 20°C a slower time for the cross to disappear
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everyone else.English Test 5 Chapters 1-6 flashcards | Quizlet quizlet.com/30846533/english-test-5-chapters-1-6-flash-cards/ Quizlet What conclusion can you draw from the fact that every new colony must provide a prison and cemetery at once? Many bad people come to the colonies that ... what conclusion can you draw from the fact that every new ... www.chacha.com/.../what-conclusion-can-you-draw-from-the-fact-that-e... "Every new colony must provide a prison and a cemetery" in The Scarlet Letter draws
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Teletech Corporation‚ 2005 Kyle Fortin My recommendation for Teletech Corporation is to change from a constant hurdle rate to the use of two risk-adjusted hurdle rates‚ one for each segment. Teletech’s performance is evaluated based on economic profit calculations. Through this measure‚ the risk-adjusted hurdle rates return a higher amount of profit compared to a single corporate hurdle rate. Currently‚ the firm has been using 9.30% as their hurdle rate‚ and as a result the firm’s share prices
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Case Study 3: Estimating the Cost of Capital 1. Currently Teletech Corporation (TC) uses a single hurdle rate for both their Telecommunications Services (TS) and Products and Services (P&S) divisions. This hurdle rate obtained by an estimate of TC Weighted Average Cost of Capital (WACC)‚ which is calculated at 9.3%. When analyzing critically at this point‚ TS is underperforming with a return on capital (ROC) of 9.1%‚ whereas‚ P&S segment is well over the required rate of return as it is gaining
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Problems and Questions – Risk Measurement and Hurdle Rates in Practice Rem.: Use 5.5% as your equity risk premium‚ for T. Bonds‚ where none is given‚ and 8.5% as your short term ERP. 1. In December 1995‚ Boise Cascade’s stock had a beta of 0.95. The Treasury bill rate at the time was 5.8%‚ and the Treasury bond rate was 6.4%. a. Estimate the expected return on the stock for a short-term investor in the company. b. Estimate the expected return on the stock for a long-term
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results a final conclusion can be drawn. The hypothesis was supported by graph 3 and 6 which both showed that an increase in concentration of the reacting species resulted in an increase in reaction rate. Both graphs have a positive gradient which clearly indicates that concentration increases the reaction rate. The hypothesis also proposed that as temperature increases the speed of the reaction would decrease‚ this is evidenced in graph 7 which shows a negative decrease in time as the temperature of the
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Exercise affects all people differently‚ specifically a person’s heart rate and blood pressure. After exercising your heart rate should increase and your blood pressure should decrease (Blood Pressure Association‚ 2008). The purpose of this lab was to determine which level of exercise would have the greatest impact on affected pulse and blood pressure. In this lab we tested how exercise affected heart rate by testing a random group of people with different body types and exercise levels to see how different
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Reviewer’s Name: Sanjeev Mishra UMN ID Number: 4585009 The Photoelectric Effect: A Determination of Planck’s constant Ian E. Jaeger School of Physics and Astronomy‚ University of Minnesota – Twin Cities 116 Church St. S.E.‚ Minneapolis‚ MN 55455 Abstract The photoelectric effect was explored to determine an experimental value of Planck’s constant‚ h. Included is a brief introduction to the history leading up to Einstein’s discovery of the photoelectric effect as well as the theory behind
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