solids is done by observing the melting point. This is important because if there is an impure substance the melting point would be depression and the melting range would be broader. By finding the melting point of a known substance one can then observe an unknown substance’s melting point to see if the points are the same and try to figure out the unknown. Experimental Section: The first known substance we used was Biphenyl. 68 degrees Celsius is the known melting point. We used the capillary
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Tourism “Honeypots” like Castleton create significant challenges in National Parks. How far does the research you have carried out make you think this statement is correct? My aim is to investigate whether Castleton has been affected by tourism‚ and what challenges Castleton faces as it in the National Park. I will be asking local people but also tourists to volunteer to answer my questionnaire as this would determine but also tell me whether Castleton has been affected by tourism. As below
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Summary Purpose To purify the component (unknown) of Pancetin from last experiment and then compare its melt point to the two other possible substances. Theory Panacetin should be made up of about 50 percent of the unknown component that we previously separated out of Panacetin for testing. We suspect that this unknown compound is either acetanilide or phenacetin. From the solubility of acetaminophen and phenacetin‚ we could know both of them are relatively soluble in boiling water but insoluble
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y to change from the differing states of matter. Due to thermal equilibrium‚ the water would need a set amount of energy to break through the changes in matter. This is why temperature slows down in these phase changes. 2. When the ice is melting is it releasing heat or absorbing heat? Explain your answer. It is absorbing heat as it tries to achieve thermal equilibrium with the incoming heat. The water has more energy‚ which is why the water goes to a more easy to move around “phase” form from
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My SRP is determining if the colour of ice affects its melting rate. Ice melts by taking in energy from its surroundings to form heat. This makes the molecules in the ice cube vibrate. As the overall vibration increases‚ the water molecules split from each other turning the ice from a frozen state to a liquid state. Heat can be absorbs in two different ways‚ through direct contact with a hot surface or through radiation of a hot surface nearby. Radiant heat can be contributed by sunlight‚ fires and
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San Diego Chicken Pie Shop. Before entering the restaurant‚ it was difficult to find parking which his always a sign of a good restaurant. Once you find parking and enter the restaurant‚ you are greeted by the delicious smell of fresh chicken pot pies and by an older waitress who quickly seats you. You can choose to dine in or take out. The time was around noon‚ the place was packed‚ and the décor looked like it hadn’t been updated since 1985. Most of the patrons were older folk that look
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Biography of Pol Pot. Boulder‚ CO: Westview P‚ 1992. Chandler‚ David P Donnell‚ John C. "Vietnam 1979: Year of Calamity." Asian Survey 20 (1980): 19-32. JSTOR Frieson‚ Kate. "The Political Nature of Democratic Kampuchea." Pacific Affairs 61 (1988): 405-427 Jackson‚ Karl D. "Cambodia 1977: Gone to Pot." Asian Survey 18 (1978): 76-90. JSTOR Jackson‚ Karl D. "Cambodia 1978: War‚ Pillage‚ and Purge in Democratic Kampuchea." Asian Survey 19 (1979): 72-84 Kiernan‚ Ben. The Pol Pot Regime: Race‚ Power
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The Purity and Purification of Solids- Part 2- Recrystallization Courtney Percival CH 337 Laboratory‚ Section 037 Department of Chemistry Portland State University‚ Portland OR ABSTRACT INTRODUCTION Recrystallization is a commonly used tool in laboratories when dealing with impure solids. "An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample".1 Solubility‚ the tendency of a substance to dissolve in a liquid‚ is an
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think‚ accurately— summarizes recent efforts to do just that.1 These entail the identification of and subsequent assault on something called “the critical” or “critical architecture‚” usually accompanied by a collateral assault on something called “theory.” At the risk of erecting yet another straw figure that tramples on the subtleties of Baird’s analysis‚ it might be fair to characterize such practices‚ variously named “post-critical” or “projective‚” as sharing a commitment to an affect-driven‚ nonoppositional
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efficient frontier “OCTOBER: This is one of the peculiarly dangerous months to speculate in stocks in. The other are July‚ January‚ September‚ April‚ November‚ May‚ March‚ June‚ December‚ August‚ and February.” (Mark Twain) Key ideas of portfolio theory • Risk of a single investment vs. the new investment as part of one’s existing portfolio? • Diversification = “Don’t put all your eggs in one basket” • Finding the least risky portfolio for any level of target return • Finding the portfolio with
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