The United States is a melting pot of many cultures‚ races and ethnicities. I have learned that each group has differences and many similarities. With these differences they have taught me to be tolerant and accepting of them. By embracing the differences through our diverse society‚ I have learned new concepts of living‚ new ways to think‚ and have been introduced to a variety of foods that I have enjoyed. It seems in the end many of the groups that are so different have a common interest which
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the freezing point will be somewhat lower‚ and there will be a range of temperatures instead of a single temperature. PROBLEM To evaluate the samples‚ you will need a heating/cooling curve for pure Na2S2O35H2O that you can use as a standard. To create and use this curve‚ you must do the following. • Obtain a measured amount of pure Na2S2O35H2O. • Melt and freeze the sample‚ periodically recording the time and temperature. • Graph the data to determine the melting and freezing points of pure Na2S2O35H2O
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pleasant flavor‚ innocuousness‚ smoothness during application‚ adherence and easy intentional removal. This work involved the development of a lip balm formulated with certified organic raw materials and the execution of stability tests: fusion point determination‚ evaluation of organoleptic characteristics (color‚ odor and appearance) and functionality evaluation (spreadability test). The formulation selected after the Preliminary Stability Test was submitted to the Normal Stability Test under
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Recrystallization Experiment 2: Recrystallization & Melting Point • Most important method for the purification of organic solids • Separation of compounds based on differences in solubility between the compound of interest and its contaminants • Basic technique: 1. dissolve impure sample in an "appropriate" hot solvent Part A: Choosing a Solvent Part B: Purification of Phenacetin 2. cool solution slowly to induce crystal growth 3. filter resulting mixture to isolate crystals Reading:
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what is called a melting pot; however‚ I would argue that America should no longer be called a melting pot. The term melting pot suggests that immigrants should assimilate into American culture. Instead‚ America should be looked upon as a salad bowl society or a mosaic work of art allowing our newcomers to bring their racial and ethnic differences to the country. This allows our newcomers to “retain their own national characteristics while integrating into a new society” (“Melting Pot America”).
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Nick Boyea Billy Lee 3/9/11 Molar Mass by Freezing Point Depression Overview The purpose of this lab is to measure the freezing point depression of a solution of an unknown substance and BHT to determine the molar mass of the unknown substance. Summary of Lab Procedure If not already completed‚ crush a small amount of BHT and pack it into a capillary tube. Use a small rubber band to clamp the capillary tube to the thermometer‚ and fasten the thermometer to a ring stand. Fill a Thiele tube
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America: Melting Pot vs. Salad Bowl Multiculturalism is also known as ethnic diversity relating to communities containing multiple cultures. The term is used in two different broad ways‚ descriptively and normatively. By using the descriptive term‚ we usually refer to the simple fact of cultural diversity. This can be applied to the demographic make-up of a specific place and sometimes at the organizational level such as schools‚ neighborhoods or nations. The normative term is often referred to
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Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane
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salt melts ice? Salt melts ice by lowering the freezing point of the water around the ice. The ice melts and is unable to re-freeze except at a much lower temperature. Adding minerals‚ like salt‚ to ice can increase the rate of melting by disrupting the balance of the molecule. It is hard for salt to be absorbed by ice‚ but easy by water. Salt‚ on the other hand‚ combines with the ice (water) to produce a solution with a lower freezing point. This would melt the ice without sunlight‚ as long as the
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Finding the melting point of an organic substance is a practical and efficient way for scientists to identify an unknown substance or determine a known substance’s level of purity. When organic substances are mixed together in varying degrees they take on a melting characteristic that is lower and broader than in its pure form. This property was manipulated in the lab to observe the various melting points of Naphthalene and Biphenyl when the percentage of composition was altered. A eutectic point of 45
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