changes in Figure 3-2 are shown in pairs. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 11. The phase change that is the reverse of sublimation is a. deposition c. condensation. b. vaporization. d. melting. ____ 12. The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is a. melting. c. deposition. b. sublimation. d. vaporization. ____ 13
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INTRODUCTION Acetone also called 2-propanone or dimelthyl ketone is the organic compound with the formula of (CH3)2CO. Acetone is one of the simplest of the organic compound that called ketones. The figure below showed the chemical structure of acetone: Figure 1: Chemical structure of Acetone This chemical is the one of the most important in chemical industry due to their properties. It is a colorless liquid that has a characteristic of sweet odor and used as a nail polish remover. It
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Units) Assume that a parcel of air is forced to rise up and over a 4000-meter-high mountain (shown below). The initial temperature of the parcel at sea level is 30°C‚ and the lifting condensation level (LCL) of the parcel is 2000 meters. The DAR is 10°C/1000 m and the SAR is 6°C/1000 m. Assume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends. 1. Calculate the temperature of the parcel at the following elevations as it rises up the
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Purpose- This experiment illustrates the use of adol condensation for the synthesis of a five-membered carbocylic ring. It is also a good demonstration of the impact extended conjugation has on the absorption of visible light. The reactants are bright yellow in color while the products are a very deep purple color appearing almost black. Introduction- The synthesis of Tetraphanylcyclopentadienone was a further example of the adol condensation reaction. Tetraphenylcyclopentadienone was the final
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asthma and analgesic. There are various approche to the synthesis of coumarin. They are perkin reaction‚ knovenagel condensation‚ clasen rearragenment and pechmann condensation. The synthesis that’s important to us is the knovenagel condensation (Figure 1) and the perkin reaction (Figure 2). The knovenagel condensation is named after Emil Knovenagel. The Knovenagel condensation is a key to the commercial production of the antimalarial drug lumafrantrine. The perkin reaction was develop by William
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mountain‚ should the relative humidity of the parcel change as it rises from 2000m to 4000m? (a) No‚ the relative humidity should not change. (b) The elevation at which the parcel of air reaches its dep point temperature is called the lifting condensation level. The LCL in this example was 2000m‚ so the relative humidity is at 100% already. 6. As the air rises up the windward side of the mountain: (a) What is the capacity (saturation mixing ratio) of the air at 2000 meters? 7.6 g/kg (b) What
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air the temp decreases at the rate of 1 °C for every 100 m of altitude. In moist air (when condensation begins)‚ the temp decreases at the rate of o.6 C for every 100 m of altitude. Surface temperature equals 25 Condensations begins 900 900/100= 9 25-9=16 1400-900=500 0.6*5= 3 16-3=13 People that live on the coast where in which they receive more moderate climate. Surface temperature equals 24 C Condensation begins at
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Escherichia coli and Staphylococcus albus Some bacteria’s require a certain amount of light in order to function properly and there fore survive. Escherichia coli is found in the gut and intestines of mammals. Staphylococcus albus is generally a skin dwelling bacteria Aim: To test whether the amount and type of light that the bacteria’s E.coli and S.albus are subject to causes changes in their growth rates and habits. To test whether the growth rates and habits of the bacteria’s E. coli
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CHEM%2315%Fall%2014% Creating useful and beautiful molecules using synthetic organic chemistry – Synthesis of Aspirin and Indigo INTRODUCTION Aspirin Salicylic acid occurs naturally in the bark of willow trees. Prior to the 1800’s‚ willow bark was often brewed into a tea‚ or chewed to relieve pain. While the salicylic acid is effective at reducing pain it was found to irritate the lining of the stomach. It was mostly by chance that on August 10‚ 1897 Felix Hoffmann‚ a German chemist who obtained
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Xanthoproteic | Conc. HNO3‚ 50% NaOH | Nitration substitution in Benzene ring | aromatic amino acids | yellow precipitate then turns orange when neutralized with NaOH | clear solution‚ no change in color | Hopkins-Cole | Hopkins-Cole reagent | Condensation of indole group with glyoxylic acid and H2SO4 | tryptophan | Violet ring at the junction where the two layers meet | Absence of purple ring | * Acid hydrolysis is a better procedure than Alkaline hydrolysis because of the less destruction of
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