lab‚ spectrochemical technique was used to determine qualitively the product of a reaction. The purpose was to learn what a SN1 reaction was with combining 2‚5-dimethyl-2‚5-hexanediol and HCl and to learn how to use an infrared spectrum for analyzing the reaction. The infrared spectrum determined the alcohol content present in the final product. If the IR of a molecule with an alcohol is present‚ there will be an IR peak between 3400 and 3200 cm^-1. However‚ if the experiment was done successfully
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have a problem. He also describes global warming as when the sun`s radiation comes in‚ in the form of light waves passing through earth atmosphere to heat the earth‚and then it is re-radiated back into space in the form of infrared radiation‚ and some of the out going infrared radiation is trapped by the earth atmosphere and warms it. This thin layer of atmosphere is being thicken by all of the global warming pollution that`s being put up there. He speaks of Mr. Roger Revelle as the first person
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or 400×10−9 m‚ to 700 nanometres – between the infrared‚ with longer wavelengths and the ultraviolet‚ with shorter wavelengths. These numbers do not represent the absolute limits of human vision‚ but the approximate range within which most people can see reasonably well under most circumstances. Various sources define visible light as narrowly as 420 to 680 to as broadly as 380 to 800 nm. Under ideal laboratory conditions‚ people can see infrared up to at least 1050 nm‚ children and young adults
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Rebecca Boreham 7/1/14 Chem 2423 Experiment #5 Synthesis of Aspirin Elizabeth Ajasa Kaylee Seymour Lauren Hatfield Suveda Perikala Introduction/ Purpose Aspirin is the most commonly used drug in the United States. Forty million pounds are produced each year. The chemical name for aspirin is Acetylsalicylic acid. Aspirin is a pain reliever and a fever reducer. Aspirin originated from the bark of a White Willow Tree. Chewing the bark however is extremely acidicand irritates the mucous membranes
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EXPERIMENT I Photoreduction of Benzophenone Introduction The study of chemical reactions‚ isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. The fundamental principles for understanding photochemical transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for
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Speech on Global Warming I would like to begin with a statement. Our earth is in trouble. Can anyone of you argue with that? I suppose you could argue. And why is that? Because you have never deeply researched the concepts of either global warming or climate change. So what can we learn from that? The first step of solving a problem is being aware of it. So you would ask “what is global warming?” Global warming is exactly what you hear. The warming of the globe. The earth’s climate gets hotter and
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Lisa‚ or La Gioconda (La Joconde)‚ painted in oil on a poplarpanel by Leonardo da Vinci‚ has been the subject of a considerable deal of speculation.[1] Contents [hide] 1 Columns and trimming 2 Landscape 3 Other versions 4 Nude versions 5 Smile 6 Infrared scan 7 Eyebrows and eyelashes 8 Subject 8.1 High cholesterol 8.2 Letters and identity of model 9 References 10 External links Columns and trimming Early copy of the Mona Lisa at theWalters Art Gallery‚ Baltimore‚ showing columns on either side of
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her. Often this difference will spill out into the work‚ although the forger may not be aware of it. An analysis of forgery must rely on more than the expert opinion of an art historian. Laboratory materials techniques such as X-radiography and infrared reflectography help detect forgery. Recent artistic materials‚ like paper‚ inks‚ and paints are different in composition today from those used hundreds of years ago. The art
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(Saferstein‚ 2015) Two or more fibers must show the same chemical composition when an analysis is completed. The polymers compose manufactured fiber absorb infrared light in a characteristic pattern. Chemical reagents determine fiber chemical composition and the examiner uses infrared spectroscopy pyrolysis gas chromatography to identify. Later‚ it was discovered that the fibers from victim Cater’s body matched the yellowish-green carpet‚ bedspread‚ and dog hairs found
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Marketing on a mobile phone has become increasingly popular ever since the rise of SMS (Short Message Service) in the early 2000s in Europe and some parts of Asia when businesses started to collect mobile phone numbers and send off wanted (or unwanted) content. Over the past few years SMS has become a legitimate advertising channel in some parts of the world. This is because unlike email over the public internet‚ the carriers who police their own networks have set guidelines and best practices for
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