Topic 3: Nowadays‚ food has become easier to prepare. Has this change improved the way people live? Use specific reasons and examples to support your answer. Type: Hypothetical/opinion COOKING Do you cook for your family every day after work? How many times do you cook dinner in a week? Nowadays‚ all around the world‚ most people prefer quick meals during the day. According the Quick Recipes Magazine‚ modern man spend less time to cook in comparison with twenty years ago. There are several
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The technique by the name of Raman Spectroscopy was used (2013). This method detects laser light allowing for investigators to analyze lipstick marks left at the crime scene (2013). “Analyzing lipstick traces can be used to establish physical contact between two individuals‚ such as a victim and a suspect” (2013). This advancement is significant because current lipstick tracing relies on destructive forensic techniques or human opinion (2013). “Raman spectroscopy is ideal as it can be performed through
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of the alkene formed in a Wittig Reaction. The nitro group is substituted in the ortho‚ meta‚ and para positions‚ and benzaldehyde serves as a control. The ylide used is (carbethoxymethylene) triphenylphosphorane. Through the utilization of NMR spectroscopy‚ the products of the reactions will be analyzed to gain a ratio of E /Z isomers. Reaction Equations:Ethyl cinnamate from BenzaldehydeEthyl-3-(2-nirophenyl)acrylate from O-nitrobenzaldehydeEthyl-3-(3-nitrophenyl)acrylate from M-nitrobenzaldehydeEthyl-3-(4-nitrophenyl)acrylate
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Epoxidation Reactions Lab Report 2 Abstract An oxygen atom is transferred from a peroxy acid to the carbon=carbon double bond thus forming an epoxide. Scheme 1. Oxone Epoxidation. Scheme 2. mCPBA Epoxidation. The percent yield for the Oxone epoxidation reaction was 65% yield and the mCPBA epoxidation reaction was 70% yield. Oxone is the greener alternative because using mCPBA is twice as expensive as Oxone and leaves behind the epoxide plus m-chlorobenzoic acid while Oxone creates non-toxic
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Experiment Three Report Riboflavin Fluorescence Spectra Name: Holly Experimental Section: Include all details on preparation of standard solutions. Also include the vitamin tablet brand name; the listed mass of vitamin B2 per tablet; procedure used for extraction of the tablet and dilutions performed. The experiment began by determining the best wavelength at which to excite the riboflavin molecule‚ by examining the graph given in the laboratory manual[1]. Because plastic cells that absorb
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main objective is to obtain test results to determine the mechanism of the reaction and purity of the product. Introduction: The techniques used in this laboratory included reflux‚ distillation‚ and extraction as well as obtaining IR and NMR spectroscopy. The reaction of 1-Butanol to 1-Bromobutane occurs via a substitution reaction. This reaction type can proceed via either the SN1 or SN2 mechanisms. SN2 reactions have a second order rate and proceed in a single step (ie. The leaving group leaves
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hydride addition is that product is entirely a racemic mixture (McMurry 696). After the initial reaction the product was isolated using a series of vacuum filtrations‚ ether extractions‚ and rotorary evaporations‚ before being analyzed via proton NMR spectroscopy. Results and Discussion: The table listed below as Table 1 lists the starting amounts of each of the chemicals present in the reaction flask‚ along with their formula mass. Compound: Moleculear Mass (g/ mol) Mass
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Abstract Chemically active extraction was used to separate two unknown compounds from each other and to determine what compound class each compound belongs. The solid unknown was purified by recrystallization and its melting point range was determined to be 109-111°C. The liquid unknown was purified by simple distillation and its boiling point was determined to be 95°C. An IR spectrum was collected for each of the purified compounds; the solid was determined to be 3-toluic acid and the liquid was
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parents forced him to leave his hometown and move to Rome‚ once there he began his studies into the humanities and philosophy. Angelo became a great success in his work and made many large leaps in the field of Astrophysics‚ he pioneered stellar spectroscopy (the light spectrum of stars in the solar system) and he also made the first systematic survey of the night sky. He also revolutionised humanities understanding of the sun including sun-spots solar prominences and metals in the sun. His expertise
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Haier – Taking a Chinese Company Global in 2011 Haier is a Chinese consumer electronics company with its headquarters in Quingdao‚ Shandong‚ China. They were once the largest home appliance maker in China and started their business in the year 1984. In 2010‚ they were called one of the most innovative firms of the Business Weeks magazine. Their products are air conditioners‚ mobile phones‚ washing machines‚ refrigerators and televisions. The CEO of Haier‚ Zhang Ruimin‚ wanted to create
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