Chromatography • • • Separation based on polarity of compounds Two potential phases for a compound to exist in: mobile and stationary Partitioning of compounds between mobile phase and stationary phase occurs: o Compounds that are less polar move more in the mobile phase‚ those that are more polar “stick” more on the stationary phase o These polarity differences cause compounds move at different rates and therefore can be separated 1. Mobile Phase: the phase the moves; can be gas or
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CHEMISTRY COURSE TITLE: General Organic Chemistry COURSE CODE: CHM 121 ‚ UNIT: 2.0 . INTRODUCTORY AND IMPORTANCE OF ORGANIC CHEMISTRY Organic chemistry is the study of the compounds of carbon. Carbon compounds are far more numerous than those of other elements because carbon are able to bond together to form a wide range of chains and rings. The subject is named organic chemistry because living organisms are composed of carbon compounds. Organic chemistry could be regarded as the
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FBE 421 Prof. Briggs Problem Set #1 Please print out this document and clearly handwrite your answers to each of the questions below in the space provided. Show all your work accordingly. A. Calculate LTM (a) Revenue and (b) Net Income for Costco Wholesale (COST) using their latest financial statements as of 3Q2011. 77946+60737-53821=84‚862 MM Revenue 1303+984-871= 1‚416 MM Net-income B. Calculate Costco’s LTM (a) EBIT and (b) EBITDA. 2077+1677-1389=2‚365 MM EBIT (2077+795)+(1677+582)-(1389+549)=
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C5-C30 n-alkanes were used to made retention indices (RI) and 2‚4‚6-trimethylpyridine (TMP‚ purity 99 %‚ I.S.) was used to internal standard which were purchased from Sigma-Aldrich Trading Co.‚ Ltd (Shanghai‚ China). Mono Trap (MT) (Diameter 2.9 mm ×Length 5 mm‚ Hole Diameter 1 mm) (ODS‚ silica gel and activated carbon) was used for headspace MMSE was obtained from GL Science (Shinjuku‚ Tokyo‚ Japan). Extraction of volatile compounds Fish sauce samples were extracted volatile compounds by Monolithic
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ANSWER KEY: SHORT ANSWER STUDY GUIDE QUESTIONS - Othello Act One 1. What was Iago’s complaint in Scene I? Iago has been passed over for a promotion. Cassio got the promotion to Lieutenant even though Iago had more time in service as a soldier. Cassio got the promotion over Iago because his learning included theory and strategy whereas Iago’s did not. 2. Who was Brabantio‚ and why did Iago and Roderigo awaken him in the middle of the night? Brabantio was Desdemona’s father. Iago and Roderigo awaken
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Experiment 1 :Alkanes&Alkenes:Combustion and action of sulphuric acid. Introduction In the study of organic chemistry‚ the organic compounds which are made up of carbon and hydrogen are called hydrocarbons. They can be gases as‚ propane‚ they can be liquids‚ for example‚ benzene‚ or they can be low-melting solids and waxes‚ for example‚ polystyrene. There are four classifications of hydrocarbons; saturated hydrocarbons or alkanes‚ unsaturated hydrocarbons or alkenes and alkynes‚ cycloalkanes‚ and
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part-time security staff. Which of the following statements about off-duty police officers is false?Answer | | | | | Correct Answer: | they are oriented more toward prevention functions than apprehension functions | | | | | Question 2 5 out of 5 points | | | All decisions concerning security deserve careful thought and should be discussed:Answer | | | | | Correct Answer: | with legal counsel | | | | | Question 3 5 out of 5 points | | | A contract
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Examination #2 - Chapters 4‚5‚ and 6 Study Guide Chapter 4 - Chemical Quantities and Aqueous Reactions * Reactions Stoichiometry * mole-mole conversions * mass-mass conversions * Limiting Reactants * What is the Limiting Reagent * How do we find the L.R. * Solutions * Molarity - definition and how to calculate * Dilutions Calculations (M1V1 = M2V2‚ careful with M2) * Solution Stoichiometry * volume-volume conversions * volume-mass
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GATTACA Viewing Questions – Answer Key 01. What deception is Vincent (main character) trying to hard to maintain? He is trying to be Jerome‚ who has an elite genetic identity. This identity gives Vincent the credentials to work at GATTACA. 02. Describe four ways that Vincent maintains his genetic identity. a. He uses Jerome’s blood‚ urine‚ and hair. b. He uses plastic surgery to change his face; cuts and lengthens his legs. c. He scrubs off all loose
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1. Agency Problems of MNCs. a. Explain the agency problem of MNCs. ANSWER: The agency problem reflects a conflict of interests between decision-making managers and the owners of the MNC. Agency costs occur in an effort to assure that managers act in the best interest of the owners. b. Why might agency costs be larger for an MNC than for a purely domestic firm? ANSWER: The agency costs are normally larger for MNCs than purely domestic firms for the following reasons
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