organic product of the following reaction sequence. 16 Answer: 39) What reagent is needed to complete the following transformation? Answer: 40) Provide a detailed‚ stepwise mechanism for the reaction of acetyl chloride with methanol to produce methyl acetate and HCl. Answer:
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TWS Chemistry 1013-231 Organic Chemistry I Name___________________________________ 2011 Exam#2 - Version 2 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Energy is __________ when bonds are formed and is __________ when bonds are broken; therefore‚ bond dissociation energies are always __________. A) consumed / released / endothermic B) consumed / released / isothermic C) released / consumed / endothermic D) consumed / released / exothermic
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INTRODUCTION: Carboxylic acids are organic acids characterized by the presence of a carboxyl group‚ -COOH. This acid acts as a weak acid‚ which can react with a strong base. Carboxylic acids form hydrogen bonds with many water molecules and are more soluble with one to four carbon atoms. Also‚ it may have an R group that consist of hydrogen or an alkyl group that changes its water solubility. Carboxylic acids with low molecular weight have odor at room temperature and higher molecular weight
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EXAM III CHEM 2211 November 3‚ 2010 NAME: ____________________________________________ Please be certain to answer all questions. Partial credit cannot be given the questions left blank. 1. Give the IUPAC name for the following compound. A) (Z)-2‚3‚6-trimethyl-2-heptene B) (Z)-2‚3‚6-trimethyl-3-heptene C) (E)-2‚3‚6-trimethyl-3-heptene D) (E)-2‚3‚6-trimethyl-2-heptene E) (E)-2‚4‚6-trimethyl-3-heptene 2. Which of the following statements is (are) true about compound A?
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mL solution of 0.616 M HBr? Report your answer to the correct number of significant figures. 11. Write a balanced chemical equation for the combustion of benzene‚ C6H6. 12. If the standard heat of combustion of benzene is –3271 kJ/mol‚ [(CO2(g)] = –394 kJ/mol‚ and [H2O(l)] = –286 kJ/mol‚ calculate the standard heat of formation of benzene. Report your answer to the correct number of significant figures. 13. If a gas sample absorbs 59 kJ of heat
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INTRODUCTION – NEED FOR BIO-FUELS The recent upheavals in the oil market leading to record oil prices‚ have again turned the world attention to alternative sources of energy. A number of them are being researched Nuclear energy‚ Hydrogen energy‚ Wind energy‚ Solar energy & Bio-energy. Use of nuclear energy and hydrogen energy for civilian purposes are in very nascent stages. Fuel cells are more promising‚ but they are yet to be put in commercial practice. Wind energy and solar energy
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ABUSE IN DISGUISE Hindustan Unilever –Stealing lives 2011 Sometimes‚ the good things that are meant for the mankind often end up to be the disaster of the same. Factories and companies that were set up in the guise to provide employment and economic stability of thousands of families are often in reality destroy the lives of several thousands and cause irrevocable damage to the lives of the dependant and the environment as a whole. Such evil companies often target the developing world because of
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concentrated hydrochloric acid. Q6. Explain why the solution became milky white in appearance after adding 11 M HCl(aq) to the tertiary butyl alcohol. Q7. A student is given two alcohols with which to perform Lucas Test. These are cyclohexanol and 2-methyl-2-propanol. The bottles containing each alcohol are labelled‚ but the propettes used are not. The student accidentally muddles the propettes. When drops of each alcohol are mixed with Lucas. Reagent and kept at 27 °C‚ both solutions become turbid
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refluxing began and ended once the bromobenzene addition was completed. The second phase of the experiment involved the reaction of the phenylmagnesium bromide with assigned carbonyl compound. Appropriate amounts of benzaldehyde‚ benzophenone‚ or methyl benzoate based on the amount of bromobenzene used should be added to a dry beaker along with anhydrous diethyl ether. The mixture was poured into the addition funnel‚ added to round bottom flask drop wise‚ allowed to reflux for an additional 15 minutes
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acid and gas. If the organism is unable to ferment the sugar in the tube‚ there will be no change in the orange/red color of the broth and will be considered alkaline. The following tests that I performed were tests for methyl red and vogues proskauer in SIM media. A positive methyl red test indicates a mixed acid fermentation and would turn the organism’s broth red‚ if no color presents‚ it is negative. A positive vogues proskauer test indicates fermentation to neutral products and will turn the broth
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