Question Solved1 Answer Identify the nucleophilic centres in the following molecule: 8 OH 2 3 4 5 1 6 NH2 7 Type numbers of all of the nucleophilic centres in ascending order separated by a comma, if there is no nucleophilic centres in this molecule type "None". Do not use numbers in written form. Do not include any spaces in your submitted answer. Identify the electrophilic centres in the following molecule: 1 H 4 Н 2 H 3 Type numbers of all of the electrophilic centres in ascending order separated by a comma, if there is no electrophilic centres in this molecule type "None". Do not use numbers in written form. Do not include any spaces in your submitted answer. Identify the nucleophilic centres in the following molecule: 1 2 3 4 MgBr Type numbers of all of the nucleophilic centres in ascending order separated by a comma, if there is no nucleophilic centres in this molecule type "None". Do not use numbers in written form. Do not include any spaces in your submitted answer.

1. Consider the reaction 5Br−(aq)+BrO−3(aq)+6H+(aq)→3Br2(aq)+3H2O(l) The average rate of consumption of Br− is 1.96×10−4 M/s over the first two minutes. What is the average rate of formation of Br2 during the same time interval? 2. A certain second-order reaction (B→products) has a rate constant of 1.00×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 226 s . What is the concentration of the reactant B after one half-life? Express your answer with the appropriate units.

In this problem, y = 1/(x² + c) is a one-parameter family of solutions of the first- order DE y' + 2xy? = 0. Find a solution of the first-order IVP consisting of this differential equation and the given initial condition. %3D y(3) = 5 y = Give the largest interval I over which the solution is defined. (Enter your answer using interval notation.) Need Help? Read It Watch It Master It

1. Explain the difference between logical and physical address. 2. A user process with 4063 bytes of memory needs to be allocated in primary memory with a frame size of 64 bytes a. How many frames will be needed to store the user process? b. Will there be an internal fragmentation? If so, what is the internal fragmentation? c. If the snap shot of the page table shows: Page Table f р 9 2 5 43 28 44 i. What is the physical address of page 43 offset 21? ii. What is the logical address of page 43 offset 21? iii. What is the page number and offset of logical address 1827? iv. What is the physical address of logical address 1827? V. What is the physical address of 3626? 3. A system using segmentation provides the segment table below. Compute the physical address for each of the logical addresses. If the address generates a segment fault, indicate so. a. 0, 323 b. 1,856 c. 2, 234 d. 3, 1009 e. 2,533 Segment Base Length 0 1311 400 1 900 2711 500 2 411 الیا 1100 4211 A. Using the reference string below with 4 page frames: 03132360 41 42 4 60 51 52 54 0 3 1 3 1. What is the page fault using: a. FIFO b. OPT c.LRU 2. If the page frame is increased to 5, what is the page fault using: a. FIFO b. OPT C.LRU B. Given the processes below: Process Process Size Equal Allocation Proportional Allocation A 38 B 57 с 43 D 25 E 19 1. The available frames inside the primary storage is 20, how many frames will be allocated to each of the processes using: a. Equal allocation b. Proportional allocation 2. If the process is to be split into equal pages where the page size is 8, a. How many frames will be used by each of the processes? b. Will there be an internal fragmentation? If so, what is the internal fragmentation?

In this problem, y = 1/(x2 + c) is a one-parameter family of solutions of the first-order DE y' + 2xy2 = 0. Find a solution of the first-order IVP consisting of this differential equation and the given initial condition. y(3) = 1/5 y = ? Give the largest interval I over which the solution is defined. (Enter your answer using interval notation.) ? need two answer

0 S X-S= 1-K 5-x, Let f(x) = { 3x x<3 + 1, x>3. Complete parts a through d below. a. Find lim f(x) and lim f(x). Select the correct choice below and, if necessary, fill in any answer box(es) in your choice. x+3+ X-3 OA. ОВ. lim f(x) = and lim f(x) does not exist. X-3 (Simplify your answer.) lim f(x) = . lim f(x) = X-3" (Simplify your answers.) lim f(x) = and lim f(x) does not exist (Simplify your answer.) Ос. b. Does lim f(x) exist? If so, what is it? If not, why not? Select the correct choice below and, if necessary, fill in any answer box in your choice c. Find lim f(x) and lim f(x). Select the correct choice below and, if necessary, fill in any answer box(es) in your choice. X-5 X-5+ X-5 d. Does lim f(x) exist? If so, what is it? If not, why not? Select the correct choice below and, if necessary, fill in any answer box in your choice X5

can please answer this question, thank you I need today 1. A post-tensioned bonded concrete beam has a prestress of 1560 kN in the steel immediately after prestressing which eventually reduces to 1330 kN. The beam carries two live loads of 45 kN each in addition to its own weight of 4.40 kN/m. Compute the extreme fiber stresses at mid- span: 45 KN 45 KN 4.5 m 3 m 4.5 m 300 mm 0 600 mm 175 mm Mid span section 15 points 1.1 under the initial condition with full prestress and no live load * Your answer 1.2 under final condition after all the 15 points losses have taken place and with full live load *