intermolecular attraction. For example‚ the freezing point of a solution is lower than that of the of the pure solvent and the boiling point is higher. Colligative properties of solution are those that depend on the concentration of solute particles in the solution‚ regardless of what kinds of particles are present the greater the concentration of any solute‚ the lower the freezing point and the higher the boiling point of a solution. FREEZING POINT LOWERING A liquid begins to freeze when temperature
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spring and summer is the principal melting energy source. Most operational procedures for snow melt prediction rely on ambient air temperature as the index of the energy available for melt. The temperature index is usually used to characterize the level of the energy balance because it is superior to other simple methods for the full energy balance at the snow surface. As long as snow remains bright‚ the sunshine bounces off and is not retained to cause any melting. Two factors other than sunshine
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Wilson’s Fourteen Points vs. Treaty of Versailles World War One was a tragedy that affect not one but many countries. It brought destruction‚ starvation‚ enemies‚ and death not only of soldiers but of normal civilians. There were two proposals created to end World War One: Wilson’s Fourteen Points and the Treaty of Versailles. They were both created to bring peace between the countries. However‚ they both had their positives and negative effects. Wilson’s Fourteen Points would have more independent
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computer packaged as a store controller that could control 128 IBM 3653/3663 Point of Sale Registers. This system was the first commercial use of client-server technology‚ peer to peer communications‚ and Local Area Network (LAN) simultaneous backup and remote initialization. Other computer-based manufacturers were Regitel‚ TRW‚ and Datachecker. 1973 also brought the introduction of the UPC barcode readers to the point of sale systems. By mid-1974‚ IBM 3653 Store System was installed in Pathmark
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The Melting Pot 1. Why has it been so difficult for Hmong refugees to adjust to life in the United States? It has been so difficult for Hmong refugees to adjust to life in the United States because lifestyle was very different from theirs. They didn’t know a telephone‚ an air conditioner‚ a light switch‚ etc. even existed. They wanted to keep their traditions‚ their culture. They were empty about new ideas and new experiences. This means that they were full of the past. Also‚ because they
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Acetone has a molar mass of 58.1 g mol-1 and a density of 0.787 g cm-3. 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
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2011 19th IEEE International Conference on Network Protocols Internet Exchange Points and Internet Routing Mohammad Zubair Ahmad and Ratan Guha Department of Electrical Engineering and Computer Science‚ University of Central Florida‚ Orlando‚ Florida Email: {zubair‚guha}@eecs.ucf.edu I. I NTRODUCTION The Internet is a network of Autonomous Systems (ASes) comprising of a complex and complicated ecosystem of networks used for a wide variety of applications. ASes exhibit varied functionality
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language‚ ate different foods‚ dressed differently‚ and lived a different lifestyle is a huge sacrifice in itself. Achieving the American dream was their goal. The two different views of America could change a whole country. The poster represents the "Melting Pot" America. The immigrants were to blend into the American culture and society. Rather than bringing their old country into America‚ and changing it. The poster is promoting to "Keep America Great‚" and "Learn the Language." The article states
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find the quality of NaCl as a deicer. These experiments included testing the freezing point depression of NaCl in solution at two different concentrations‚ testing for the H of an aqueous NaCl solution‚ and combining NaCl with MgCl2 in an aqueous solution to test for freezing point depression. Through these various experiments we found NaCl to be the best deicer for our region due to its proficient freezing point depression and its cost efficiency. Introduction As scientists we were given the
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key concepts in this experiment is the term freezing point depression. The definition of this phrase is that when a solute is dissolved into a solvent‚ their collective boiling point will be less than that of the original boiling point of the solvent. This incidentally leads to another important definition‚ the colligative properties of a solution. This means a particular set of characteristics that are unique to that solution. As the freezing point of the solution decreases‚ the solution then attains
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