Vanadium‚ pronounced veh-NAY-di-em‚ atomic symbol V‚ and atomic number associated with this transition metal is 23. The atomic weight of Vanadium is 50.942 grams per one mole. The electron configuration is 1S2 2S2 2P6 3S2 3P6 4S2 3D3 and the noble gas notation is [Ar] 4S2 3D3. Vanadium is located in group 5B‚ in the transition metals‚ on the periodic table of the elements. Also‚ included in this group are niobium [atomic number 41 with an atomic weight of 92.9064 grams per mole]‚ tantalum [atomic
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Tannery Apex tannery specialized in cow full chrome‚ cow semi chrome‚ cow vegetable‚ goat full chrome‚ goat semi chrome and various types of leather for shoe and leather goods. In finishing Apex tannery specialized in natural looking aniline and semi aniline finish with good look and good touch following the latest market trends. 1.4. Concept of corporation Dividend Policy: In simple words Dividend means a portion of shareholders earnings‚ which is distributed among the shareholders of the
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Chem 110- Fall 2012 Review Questions –Chapters 15 1. What mass of NaOH is required to prepare 100.0 mL of NaOH(aq) that has a pH = 13.62? 2. What is the [OH-] in 0.025 M HCl ? 3. What is the pH of 0.50 M Sr(OH)2 ? 4. The pH of an aqueous solution is 10.32. The [OH-] is …………………… 5. The [H+] in 0.050 M Mg(OH)2 at 25oC is ………………………. 6. The pH of 0.20 M HNO3 is ……………………. 7. A solution is prepared by adding 200. mL of 0.125 M of HCl to a 500.0mL volumetric
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Introduction The purpose of this experiment is to validate the effectiveness of different types of disinfectants and antibiotics on microbes. It was hypothesized that antibiotic products work better than regular products such as soap‚ hand sanitizer etc. According to the handout that was provided in this laboratory work‚ it was believed that many of the environs occupied by individuals are exposed to different types of microbes and methods of eradicating such microbes has been studied over the years
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Synthesis of Phenols You can prepare phenols in large quantities by the pyrolysis of the sodium salt of benzene sulfonic acid‚ by the Dow process‚ and by the air oxidation of cumene. Each of these processes is described below. You can also prepare small amounts of phenol by the peroxide oxidation of phenylboronic acid and the hydrolysis of diazonium salts. Pyrolysis of sodium benzene sulfonate In this process‚ benzene sulfonic acid is reacted with aqueous sodium hydroxide. The resulting salt
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------------------------------------------------- Liquid–liquid extraction From Wikipedia‚ the free encyclopedia Liquid–liquid extraction also known as solvent extraction and partitioning‚ is a method to separate compounds based on their relative solubilities in two different immiscible liquids‚ usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase. Liquid–liquid extraction is a basic technique in chemical laboratories‚ where it is performed
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Extraction (Ch # 07) Faraz Gohar Mr. Wayne Xie Chem 201 10/02/2012 Objectives : 1)To purify samples of organic compounds that are solids at room temperature. 2)To dissociate the impure sample in the minimum amount of an appropriate hot solvent Chemical Index : Naphthalene; mp 82 *C 1‚4-Dichlorobenzene; mp 56 *C 4-Chloroaniline; mp 68 - 71 *C; pKb 4.15 Ethyl 4-Aminobenzoate; mp 90 *C; pKb 4.92 Procedure :
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This name‚ meaning rock oil‚ is applied to certain bituminous fluids found in the earth. Solid bitumen‚ or asphalt‚ differs but little in chemical composition from petroleum‚ both being compounds of carbon and hydrogen Many varieties of petroleum‚ and perhaps all‚ become thicker by exposure to the air‚ and finally solid‚ resembling asphaltum. Bitumen‚ and doubtless petroleum also‚ was known from the earliest ages‚ being the "pitch" which Noah used in building the Ark‚ and the "slime" used for
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te‚ rr*‚.ktn Bachelor’s Degree Programme (BDP) ASSIGNMENT (For July 2013 and January 2014 Sessions) Foundation Course in English FEG-02 fiort:nn frWw&ffiL;qLq*s/jr lfirf Ff {)pr.f .s *4ry:Ffl r uNtvERsrlnl School of Humanities Indira Gandhi National Open LTniversity Maidan Garhi‚ New Delhi-l10068 FOUNDATTON COURSE rN ENGLTSH (FEG-02) Programme: BDP/201 3-l 4 Course Code: FEG-02 Dear students. You are required to do one assignment for the Foundation Course in English-02
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him find a safe and reliable artificial hair dye. Schueller eagerly volunteered. As Ruth Brandon explained in Ugly Beauty‚ - “He discovered that hair dyes were based upon four groups of substances: anilines‚ silver nitrate‚ pyrogallic acid and lead acetate. The first group was the most dangerous. Aniline derivatives are very soluble‚ going through many intermediate stages before forming the lacquers which give the hair its new
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