[pic] Master of Science Degree in Industrial and Environmental Chemistry Part I Examination Academic Year 2007/2008 – January 2009 INEC 54062– Soil Chemistry and Terrestrial Pollution Number of Questions: Four (04) Number of pages: Four (04) Time : 02 hrs Answer all questions ___________________________________________________________________________ (01) Answer
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of the circle is 115. Calculate (a) the area of the sector AOB. (b) the area of the shaded region. (226 ‚ 124 nQ2. Consider a triangle and two arcs of circles. The triangle ABC is a right-angled isosceles triangle‚ with AB = AC = 2. The point P is the midpoint of [BC]. The arc BDC is part of a circle with centre A. The arc BEC is part of a circle with centre P. (a) Calculate the area of the segment BDCP. (b) Calculate the area of the shaded region
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Midterm Practice Problems Chapter One: CR 1.2‚ 1.6‚ 1.13 2. Disadvantages: unlimited liability‚ limited life‚ difficulty in transferring ownership‚ hard to raise capital funds. Some advantages: simpler‚ less regulation‚ the owners are also the managers‚ sometimes personal tax rates are better than corporate tax rates. 6. In the corporate form of ownership‚ the shareholders are the owners of the firm. The shareholders elect the directors of the corporation‚ who in turn appoint the firm’s management
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calculations and be careful to follow significant figure rules in each calculation. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) Trial 1- 10.5 36.5-26= 10.5 Trial 2- 10.9 36.5-25.6= 10.9 Trial 3- 10.7 36.7-26= 10.7 2. Calculate the density of the unknown liquid for each trial. (Divide the mass of the liquid calculated above by the volume of the
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| 0.0130 | 0.0221 | mole solute/kg solvent | 0.731 | 1.253 | 3. Convert a moisture content of 85 % wet basis to moisture content dry basis. Ans: MCdb = 5.67 or 567 % 4. A food is initially at a moisture content of 90 % dry basis. Calculate the moisture
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confectionary items to a foreign company at a price of LCU 23‚000 when the direct exchange rate was 1 LCU = $1.08. The account has not been settled as of December 31‚ 2009 (the company’s year-end)‚ when the exchange rate has decreased to 1 LCU = $1.10. Calculate the amount of gain or loss that Mint will record on its financial statements related to this transaction. Be sure to clearly indicate if it is a gain or a loss. $460 Gain Problem 2 5 Points On June 30‚ 2009‚ String Corporation
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Overview The footwear industry is a mature‚ very competitive with low growth and stable profit margins. Active Gear‚ Inc. is a privately held footwear company which is a profitable firm in the industry with $470.3 million revenue in 2006. West Coast Fashions‚ Inc is a large business of men’s and women’s apparel decided to dispose of one of their divisions: Mercury Athletic with $431.1 million revenue in 2006. AGI is very profitable but it is smaller than other competitors‚ which is becoming a competitive
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Variable Cost – Salvage value Cu = underage cost per unit Cu = Price – Cost (+ Future Cost) STEP 2: Find Critical Ratio F(Q*) = Probability demand < Q. Cu /Cu+ C0 = critical ratio/srvc level STEP 3: Calculate z from table. φ(Ζ) = Critical ratio STEP 4: Calculate Q* = optimal order quantity Ζ= from above (table) μ = mean σ = standard deviation aka measure of uncertainty ~~~~~~~~~~~~~~~~~~~~~ NEWSVENDOR VARIATIONS (Co/Cu) Ratio Given 1. Critical Ratio F(Q)
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1. Energetics si ygrene neht srucco egnahc yplahtne na fI dna )rH In an exothermic change energy is transferred from the system (chemicals) to the surroundings. The products have less energy than the reactants In an endothermic change‚ energy is transferred from the surroundings to the system (chemicals). The products have more energy than the reactants Enthalpy changes are normally quoted at standard conditions. Standard conditions are : • 1 atm pressure • 298 K (room temperature or 25oC) • Solutions
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Epsom salt have many uses‚ including use as bath salts‚ as a laxative and as a plant nutrient. Epsom salt contains hydrated magnesium sulphate which has the formula MgSO4.xH2O. Experiment to find the value of x in a pure sample of hydrated magnesium sulphate. The method i will use is heating a known mass of magnesium sulphate to remove the water of crystallisation. x is found by weighing before and after heating to find the mass of the water then using the moles calculations to find x. The source
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