trial 1 ΔTf = -8° C - 0°C = -8°C Ethyl alcohol trial 2 ΔTf = -7° C - 0°C = -7°C 2. ΔTf = Kfm m = ΔTf / = Kf Isopropyl alcohol trial 1 m = ΔTf / = Kf = -11°C / -1.86 °C/m = 5.91 m Isopropyl alcohol trial 2 m = ΔTf / = Kf = -10°C / -1.86 °C/m = 5.38 m Ethyl alcohol trial 1 m = ΔTf / = Kf = -8°C / -1.86 °C/m = 4.30 m Ethyl alcohol trial 2 m = ΔTf / = Kf = -7°C / -1.86 °C/m = 3.76 m 4. kg of solvent = volume of solvent x density of solvent kg of solvent = 10 mL
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The Kenyan Natural Resource Management project The project location is an area called Cherangany Hills‚ an area covered by rich forest and includes numerous national parks‚ swamps‚ lakes and conservation areas. A large indigenous population known as the Sengwer People‚ also called Cherangany or Dorobo by some are also from this area. This project that was intended for financial and industrial improvement of the native people of Cherangany Hills actually caused a lot of chaos and heartbreak and displacement
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retention‚ in contrast to the multi-store model. It is an optional process rather than the only means by which information is kept in immediate memory. The working memory model also explains many psychological observations. The KF case study supports the Working Memory Model. KF suffered brain damage from a motorcycle accident that damaged his
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PASM/301/3/2013 STREPIESKODE BAR CODE UNISA P248(A) PROGRAMME IN ADVANCED STRATEGIC MANAGEMENT (QUALIFICATION CODE: 76769) TUTORIAL LETTER PASM/301/3/2013 TO ALL STUDENTS REGISTERED FOR THE PROGRAMME IN ADVANCED STRATEGIC MANAGEMENT (2013) PROGRAMME WELCOME AND ORIENTATION UNISA 2 PASM/301 CONTENTS 1 2 3 4 5 6 INTRODUCTION CONTENTS OF THE PROGRAMME WHERE TO START COMMENCING WITH YOUR STUDIES COMMUNICATION WITH THE CENTRE CONCLUDING REMARKS OFFICIAL BOOKSELLERS Page
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Abstract Chemical reactions can be used to produce electricity and electricity can be used to cause chemical reactions through oxidation-reduction reactions. The first part of the experiment measures the standard electrode potentials of five various half cells against the Cu2+(1M)|Cu half cell. The last three half cells are prepared through electrolysis. The electrode potentials of all reactions are positive which means that they are spontaneous. There is a significant percent difference from the
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20% Antifreeze | -8.0°C | Calculations Questions: 1. Using the equation ΔT = Kf m‚ calculate the molality of the 10% antifreeze solution. 2. Use the formula molality = moles solute/kg solvent to find the number of moles in 10% antifreeze solution. 3. Using the formula molar mass = grams/moles calculate the molecular mass of antifreeze in the 10% solution. 4. Using the equation ΔT = Kf m¸calculate the molality of the 20% antifreeze solution. 5. Use the formula molality
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Chloroform has a molar mass of 119.4 g mol-1 and a density of 1.499 g cm-3. Estimate the volume of the above mixture using this information. 3. Calculate the molal freezing point depression constant Kf for 1-octadecanol using: Tf = 57.95 oC‚ Hfus = 74.047 kJ mol-1‚ and M = 270.5 g mol-1. ΔTf = Kf m 4. A polymer chemist dissolves 20.00g of polystyrene in 1.000L of benzene. The solution is found to generate an osmotic pressure of 1.000 kPa at 298.0K. Calculate the average molecular weight
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INTRODUCTION: The purpose of this experiment is to measure the formation constant of the tetraamminecopper(II) ion by colorimetry. Anhydrous copper sulfate (CuSO4) is white‚ which means that it does not absorb light in the visible region of the spectrum. The hydrated copper sulfate (CuSO4 - 5H2O) is blue. The structure of the compound can be represented more accurately as Cu(H2O)4 SO4 - H2O where four water molecules are bound to the copper ion and the fifth is a water of crystallization. The
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Department of Environmental Affairs and Tourism How to Start and Grow your Tourism Business What is a To u r i s t ? Getting Started Now that I am up and Running... Useful Information Department of Environmental Affairs and Tourism Acknowledgements This handbook is the result of a partnership between the Department of Environmental Affairs and Tourism‚ The Tourism Business Council of South Africa‚ The Tourism Enterprise Programme and ABSA. Limitations This handbook is based on information
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Level of exposure to rap music videos‚ the predictor variable‚ was determined by asking adolescents to estimate the number of hours they viewed rap music videos during an average day. This was multiplied by the number of days in the week that rap music videos were viewed. Music video viewing characteristics assessed included the primary type of rap music videos viewed (gangsta‚ bass‚ or hip-hop)‚ with whom adolescents usually viewed rap music videos‚ and where the rap music videos were viewed.
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