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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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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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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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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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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Part A.3. Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high‚ too low‚ or unaffected? Explain. -The freezing point will be higher because the loss of solvent means that the molarity of solute is too high. The melting point will be lower than expected. 5. Part B.2. The solute dissociates slightly in the solvent. How will the slight dissociation affect the reported molar mass
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filtration and melting point. Chm237 Abstract: Acetaminaphen was crushed then extracted for the active ingredient by mixing it with methanol. Then separated from the binders by centrifugation and a filtration technique using a Pasteur pipet packed with alumina. The remaining solvent was then evaporated to yield the solid analgesic(.2295g‚ 45.9% yield) which was collected by filtration and tested for the purity of the drug by the melting point determination. The melting point was (135-142
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