1. | An experiment is carried out to determine the freezing point of naphthalene.Solid naphthalene is heated in a water bath until it melts completely. The initial temperature is recorded. Then molten naphthalene is left to cool. The reading of the temperature is recorded every 30 seconds. Figure below shows the recorded thermometer readings at 30 seconds intervals. Satu eksperimen dijalankan untuk menentukan takat beku naftalena. Pepejal naftalena dipanaskan di dalam kukus air sehingga melebur
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Fos 108 review Math refresher 1. Qualitative = IDENTITY of a material‚ Quantitative = PERCENT COMBINATION‚ order of operations PEMDAS‚ 2. Units of length: meters (m) a. millimeters (mm): 1mm = 1-3m = 1/1000 m b. centimeters (cm): 1cm = 1-2m = 1/100 m c. kilometers (km): 1km = 13m = 1000m 3. Units of mass/weight: grams (g) a. milligrams (mg): 1mg = 1-3g = 1/1000 g b. kilograms (kg): 1kg = 13g = 1000g 4. Units of volume: liters (L) a. milliliters (mL): 1mL = 1-3L = 1/1000 L Percent of
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Economics Revision AER (saving) Annual Equivalent Rate (AER) shows the percentage of compound interest that would be paid on your savings once a year if you didn’t withdraw or add anything. The AER is the official rate for savings accounts‚ and allows you to compare rates fairly. You might also see the ‘Gross’ interest rate shown – which will be less than the AER because it doesn’t show compound interest‚ just the flat rate of interest you’d get for the original amount you saved. APR (borrowing)
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Separation of Mixtures 9/11/11 * Introduction: A compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Unlike a compound‚ a mixture is a material system made up by two or more different substances which are mixed together but are not combined chemically. There are two kinds of mixtures‚ homogeneous and heterogeneous. Homogeneous mixtures have the same composition and appearance throughout
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The scientific Method 1. Scientific Method- scientific investigation involving the observation of phenomena‚ the formulation of a hypothesis concerning the phenomena‚ experimentation to demonstrate the truth or falseness of the hypothesis‚ and result that validates or modify the hypothesis. Mechanist- Has belief that only natural forces govern living things‚ along with the rest of the universe. Vitalist- believes that the universe is at least partially governed by supernatural powers. Cause
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farmer owned trading company and now forms part of the AIM market quoted NWF Group plc. Covering the major dairy farming areas from Central Scotland all the way down the UK to Cornwall‚ NWFA’s main business is the manufacture and supply of ruminant compound feeds and blends‚ supported by a comprehensive Trading Desk supplying a range of straights and specialty feeds‚ forage seeds and additives. It is the No. 2 producer of ruminant animal feed in the UK‚ with 4‚000 customers and an annual sale of 481
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Preparation of an Ionic Compound from Aluminum Metal October 6‚ 2010 The purpose of this laboratory project was threefold‚ in that it presented three main objectives. The first objective was to prepare the ionic compound alum from aluminum powder. The alum was produced from the reduction-oxidation reaction of aluminum with potassium hydroxide and sulfuric acid in water. The second objective was to then analyze the alum product for water crystallization; that is‚ to determine the value of x in
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chapter Compound Interest: Future Value and Present Value LEARNING OBJECTIVES After completing this chapter‚ you will be able to: ● CHAPTER OUTLINE 8.1 8.2 8.3 8.4 8.5 * * Basic Concepts Future Value (or Maturity Value) Present Value Using Financial Calculators Other Applications of Compounding Equivalent Payment Streams Models of Financial Calculators Calculate maturity value‚ future value‚ and present value in compound interest applications‚ by both the algebraic method and the preprogrammed
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when compared to traditional methods. Synthesis of organometallic compounds usually requires long time at elevated temperatures and these reaction conditions are optimal to exploit microwave assisted synthesis. The target compounds are the three classes of Organo-iron complexes which are sandwich complexes‚ cyclopentadienyl carbonyl complexes and phosphine tricarbonyl complexes. Several compounds from these classes were studied and it was found that refluxing time was reduced to
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body. A medicine is often a mixture of several chemical compounds. Even if it has only one active component compound often other substances are used as fillers or binders to give it bulk. Chemistry‚ the science related to chemical substances‚ provides us the tools to make and study the substances that are the constituents of almost all medicines. The past hundred years or so‚ ever since the advent of organic chemistry‚ many chemical compounds have been discovered in nature that are effective for curing
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