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stephanie montserrat

stephanie m.

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Entropy: An ice cube at 0°C is placed in a very large bathtub filled with water at 30°C and allowed to melt, causing no appreciable change in the temperature of the bath water. Which one of the following statements is true?

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Exercise 9.1. Let Y be a geometric random variable with parameter p = 1/6. (a) Use Markov’s inequality to find an upper bound for P(Y ≥ 16). Exercises 323 (b) Use Chebyshev’s inequality to find an upper bound for P(Y ≥ 16). (c) Explicitly compute the probability P(Y ≥ 16) and compare with the upper bounds you derived.

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Part C: Resonance Donating and Withdrawing Groups (How do x donating and withdrawing groups affect the rate and placement in EAST) Model 5: Second Order Resonance Structures Second order resonance structure are like "assistant resonance structures." They do not contribute their "character" as greatly to the overall resonance hybrid as do first order resonance structures, but they can still be helpful for us in determining the arrangement of electrons in an aromatic molecule with donating- and withdrawing-substituents. Critical Thinking Questions 13. Explain why the three second order resonance structures shown in Model 5 are not first-order resonance structures. That is, why are they "not as important" as a regular, first order resonance structure such as the one on the far left, above? 14. This set of second order resonance structures tells us that the nitro group withdraws electron density into the p orbitals very strongly from certain carbons on the aromatic ring. Complete the composite drawing of nitrobenzene below by placing a 8+ on appropriate carbons in the ring. Resonance hybrid structure of nitrobenzene: (showing a combination of all first and second order resonance structures) 15. Add curved arrows to nitrobenzene at the top of the page showing how you would change it into one of the second order resonance structures. Then, use curved arrows to generate each of the subsequent second order resonance structures. 16. In the first step of an EAS reaction, a pi bond of the aromatic ring is acting as a nucleophile and attacking the electrophilic atom of E'.

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In nature one common strategy to make thermodynamically unfavroable reactions proceed is to couple them chemically to reactions that are thermodynamicallt favorable as long as the overall reactionis thermodynamically favorable even the unfavorable reaction will proceed Firely luciferase is the enzyme that allows fireflys to iliminate their abdomens Because this light generation is an atp requiring reaction

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Suppose that the selective repeat protocol is used. The sequence number space is {0,1,2,3}. Assume that the sender window size is N=3. At the start, the sender sends packets with sequence numbers in 0, 1, and 2, respectively. The receiver receives these packets and sends ACK 0, ACK 1, and ACK 2, respectively. However, these three ACK messages are lost.

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are the half life, initial, usual dose of treprostinil for IV and SQ the same

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Progress saved Done • Question 10 0/1 pt 3 19 Details < > Construct a probability distribution for the given frequency distribution. (Hint: There were 173 individuals in this sample.) Frequency x 200 13 250 13 300 43 350 12 400 41 450 10 500 31 550 9 600 1 Probability Distribution: x P(x) 200 250 300 350 400 450 500 550 600 Submit Question

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Based on recent data, it is estimated that 20 percent of the US population had a sexually transmitted infection on any given day in 2018. Which of the following are strategies that can reduce the risk of STIs?

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7 What is the equivalent resistance at terminals ab? A) 20 ? B) 18.72 ? C) 20.67 ? D) 32 ? E) 102.5 ?

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A circuit consists of two resistors in series, an R1 of 117 kΩ and an R2 of 101 kΩ, across an 11-V source. A voltmeter with an internal resistance RN of 259 kΩ is placed across R2. The voltmeter reads...

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