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© Macmillan Learning How many valence electrons are in the Lewis-dot (electron dot) structure for the neutral silicon (Si) atom? O 8 O 6 O 4 O 3 How many valence electrons are in the Lewis-dot (electron dot) structure for the neutral krypton (Kr) atom? O 6 O 4 O 8 O 3

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Q2. Show the mechanism for the following rearrangement reactions products Selected Pinacol Rearrangements 1. OH Ph C-CH2-OH Ph H + H fast Ph H slower Ph Ph Ph H 2. OH H H Ph OH Ph Ph H + Ph Ph C50% 50% Ph H heat Ph Ph Ph H rate of racemization = rate of rearrangement isotopic label C is scrambled C 3. CH3 -OH 3M HCIO4 OH CH3 cis & trans-isomers are interconverted CH3 + > 90% CH3 CH3 CH3 O < 6% 4. Ph Ph OH HO 20% H2SO4 the isomeric cyclobutanone is not observed Ph Ph Ph Ph 5. OH OH 1) H2SO4, 0°C 2) quench in KOH soln. Ph CH3 CH3 Ph -CH3 CH3 Ph CH3 cat. H2SO4 (CH3CO)20 Ph CH3 Ph Ph- = C6H5- =

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In lab, you find a vertebra with foramina situated in the transverse processes. Which type of vertebrae must this be? Thoracic Lumbar Coccyx Cervical Sacrum

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Q2. From the following information calculate the duration of the operating cycle for each of the two years Particulars 2022-2023 (Rs.) 2023-2024 (Rs.) Stocks of Raw 2,70,000 Materials work-in- 2,00,000 1,20,000 1,50,000 1,75,000 process Finished Goods 2,50,000 Purchase of raw materials on Credit 15,00,000 18,00,000 Cost of goods sold 18,00,000 19,00,000 Credit Sales 25,00,000 27,00,000 Debtors 5,00,000 6,00,000 Creditors 1,00,000 1,50,000

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Sloughing keratinocytes Dermis Keratinocytes Stratum lucidum (found only in thick skin) Stratum basale Stratum corneum Dendritic cell Stratum granulosum Melanocyte Stratum spinosum LM (400x) Dividing keratinocyte Merkel cell

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Given vectors $\vec{A} = 4\hat{i} - 4\hat{j} - 11\hat{k}$, $\vec{B} = -8\hat{i} - 4\hat{j} + 4\hat{k}$, and, evaluate (a) $\vec{A} \cdot \vec{A}$, (b) $|\vec{A}|$, (c) $(\vec{A} \cdot \vec{B})\vec{B}$, and (d) $(\vec{B} \cdot \vec{B})\vec{A}$\n\(\vec{A} \cdot \vec{A} = \\ |\vec{A}| = \\ (\vec{A} \cdot \vec{B})\vec{B} = (\\ \hat{i} + \\ \hat{j} + \\ \hat{k})\ (\vec{B} \cdot \vec{B})\vec{A} = (\\ \hat{i} + \\ \hat{j} + \\ \hat{k})

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You are serving an internship with the traffic court in the city where you live. The clerks in the traffic court office want a simple application that will allow them to enter the actual speed limit, the speed at which the offender was travelling, and how many previous violations they have received. The application should calculate charges and display how many miles over the speed limit the offender was travelling, the cost of the speeding ticket, and the court costs. The program should calculate a charge of $20 per each mile per hour over the speed limit, and court costs beginning at $74.80 per each offense. Submit a flowchart or pseudocode, the py file, and a screenshot of the working program

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Follow the video in Excel Help for HW3 called Finding data using ODESI. Download the data in the video for the National graduates survey 2018. Construct a frequency table for the variable LFCOCCP (coding the occupation category of the respondent) using Excel. Use the filter arrow on the frequency table (pivot table) to remove the values for missing data coded as 96, 97, 98, 99. The remaining data are people who answered the question. The percentage of respondents who work in a health occupation is now A. 23.4% ?. 6.1% C. 15.3% D. None of these answers are correct.

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2. Nike, Inc. has encountered two investment opportunities. Investment A, offers to pay the company $7,000 per year at the end of next five years. While Investment B, offers to pay $5,500 per year at the end of next nine years. If the required return is 5 percent, which investment will the company undertake?

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Calculate the conduction and valence band offsets in a GaAs/Ga$_{0.47}$In$_{0.53}$As heterojunction assuming that 60% of the bandgap discontinuity is in the valence band. What devices would such a heterostructure be useful for?

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amanda g.