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Which absorption could be present in the IR spectrum of the starting material methyl benzoate, but should not appear in the IR spectrum of the product benzoic acid? Group of answer choices 2950 cm-1 3050 cm-1 2250 cm-1 1350 cm-1

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An extranet is different from an intranet in that it ________.

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1. NaNH2 Li/NH3 1. BH3 ? 2. CH3CH,Br 2. H2O, H2O2, NaOH OH B) C) D) ОН

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A rope is cut into three and one-third is used. Then one-fourth of the remaining rope is cut of and used. The piece left is 5 meters long. How many meters long was the rope originally?

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Formulate the full reaction mechanism for the Fischer esterification of 2,2-dimethylpropanoic acid with ethanol. Include all lone pairs of electrons, charges and intermediates

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Review How does the average daily water consumption per person in the United States compare to other countries? ? View Available Hint(s) The United States consumes far less water per person than countries in developing parts of the world such as Sub-Saharan Africa. Most countries consume an average of 13 gallons per person per day, which is enough to cover basic human needs. The United States is second only to China in average daily water consumption. The United States is the leading per person consumer of water in the world. The United States consumes water at levels similar to European countries like the United Kingdom.

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Required information Crossing the Cell Membrane: Introduction Read the overview and complete the interactivities that follow. In this scenario, you will answer multiple choice or true/false questions about membrane transport. If you answer a question incorrectly, you will see feedback to help you learn that content. Crossing the Cell Membrane: Rate of Diffusion Water, oxygen, carbon dioxide, ethanol, and urea are examples of molecules that readily cross cell membrane by simple diffusion. They pass either directly through the lipid bilayer or through pores created by certain integral membrane proteins. The relative rate of diffusion is roughly proportional to the concentration gradient across the membrane. For example, oxygen concentrations are always higher outside than inside the cell. Therefore, oxygen diffuses down its concentration gradient into the cell. Which concentration gradient would result in a faster diffusion of oxygen? 100% concentration outside; 85% concentration inside 95% concentration outside; 45% concentration inside 75% concentration outside; 45% concentration inside 85% concentration outside; 55% concentration inside

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? Question 23 The Limbic System is the seat of emotion and learning. True False 2 pts

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3. (a) (4 pts) Show that the action of the position operator in the momentum space is given by $\hat{x} = i\hbar \frac{d}{dp}$. Hint: Evaluate $\langle p|\hat{x}|\psi\rangle$. (b) (4 pts) Show that $\langle p|e^{\pm ip_0 \hat{x}/\hbar}|\psi\rangle = \tilde{\psi}(p \pm p_0)$. That is, the position operator is the generator of translations in momentum space. (c) (2 pts) If $\hat{x}$ and $\hat{p}$ are the position and momentum operators, and $f(p)$ is a function of momentum variable $p$, $[f(\hat{p}), \hat{x}] = -i\hbar \frac{df(p)}{dp}$.

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b) Refer the circuit shown in Fig.2b, find the value of $i_b$ using Norton's equivalent circuit. Take R = 667 ?.

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scott b.