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Question 2 - Draw the reaction with curved arrows- "Cross" or "mixed" aldol reactions are practical for synthesis if one of the aldehydes (or ketones) has no α-hydrogen atoms. You can use any reaction scheme that demonstrates this principle. In your experiment, 1-indanone (with α-hydrogens) reacted with 3,4-dimethoxybenzaldehyde (no α-hydrogens) in a crossed aldol condensation. Explain why the absence of α-hydrogens on 3,4-dimethoxybenzaldehyde makes the reaction selective. Draw the reaction scheme showing enolate formation from 1-indanone, attack on 3,4-dimethoxybenzaldehyde, and dehydration to give (E)-2-(3,4-dimethoxybenzylidene)-1-indanone.

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The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. | X | 1 | 2 | 4 | 8 | 16 | | :---- | :--- | :--- | :--- | :--- | :--- | | p(x) | 0.05 | 0.15 | 0.25 | 0.30 | 0.25 | (a) Compute E(X) (in GB). (Enter your answer to two decimal places.) GB (b) Compute V(X) (in GB²) directly from the definition. (Enter your answer to four decimal places.) GB² (c) Compute the standard deviation of X (in GB). (Round your answer to three decimal places.) GB (d) Compute V(X) (in GB²) using the shortcut formula. (Enter your answer to four decimal places.) GB²

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For the quadratic equation x^(2)+3x+5=0, use the discriminant to determine if the solutions to the equation are real or non-real.

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To make their lives easier, the instructor told that this soluble salt was prepared from a Group IIA metal and a nonmetal with 6 valence electrons. 2 ion Mt2x²=2ion multipller Since they weren't very good students, Stinky and Blinky decided to add acid to The Stuff to see "what happens" and they just about killed themselves by breathing the reaction product. The following data were obtained: 1. Boiling point of the pure water = 99.2 deg * C . 2. Mass of water used to prepare salt solution = 200g 3. Mass of salt dissolved to prepare the solution = 50.0-g. 4. Boiling point of the solution = 101.33 deg * C 5. Use a Ks for water of 0.51°C kg/mol for this

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Question 1 What is a program shortcut called? O a background O a file folder O an application O an icon 1 pts

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through water instead of air (miasma theory)?What was the significance of removing the Broad Street pump handle during the 1854 cholera outbreak?

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Oloo sought to estimate the effect of time spent reading (T) and class attendance (A) on performance (P) for students taking applied econometrics unit. He run the following model and the results are shown below. Where SE is the standard error. P₁ = B₁ + BT + B₂Α+ ε 2 βο = 0.5, β₁ = 0.01, β₂ = -0.12, SE(β) = 1.1, SE(β₁) = 0.002, 2 SE(ẞ₂) = 0.1, R2 = 0.71, F statistics = 102 with P value of 0.000 Page 1 of 3 Use the above results to answer the following: i. State both null and alternative hypotheses for the above mode (4Mks) ii. Calculate t statistics for each coefficient (6Mks) iii. Interpret the F statistic iv. Interpret the R square V. (2Mks) Interpret the results for each independent variable (4Mks (6Mks)

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A block of mass m=5kg is placed on a frictionless inclined plane that makes an angle of θ=30∘ with the horizontal. The block is released from rest at the top of the incline. Calculate: The acceleration of the block down the incline. The time it takes for the block to slide a distance of d=10m down the incline.

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(13\%) Problem 10: The circuit shown consists of three resistors and two inductors. The resistors have resistances of $ R_{l}=12 \Omega, R_{2}=I I \Omega $, and $ R_{3}=8 \Omega $. The inductors have inductances of $ L_{I}=0.65 \mathrm{H} $ and $ L_{2}= $ $ 1.5 \mathrm{H} $. Dtheexpertta.com eitheexpertacom - tracking id: 5776-57-D9-42-9E215-40993, In accordance with Expert TA's Terms of Service.copying this information to any solutions sharing website is strictly fortiddek. Doing so may result in termination of your Bapert TA Account. A $ 25 \% $ Part (a) Calculate the equivalent resistance of the parallel resistor combination in $ \Omega $. \[ R_{e g} / 2= \] Grade Summary Deductions $ 0 \% $ Potential $ 100 \% $ \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|} \hline $ \sin 0 $ & $ \cos 0 $ & $ \tan 0 $ & $ \pi $ & ( & 1 & 7 & 8 & 9 & HoMm \\ \hline $ \operatorname{cotan} 0 $ & $ \operatorname{asin} 0 $ & $ \operatorname{acos}() $ & E & 11 & At & 4 & 5 & 6 & $ = $ \\ \hline $ \operatorname{atan} 0 $ & $ \operatorname{acotan} 0 $ & $ \sinh 0 $ & & 1 & $ \div $ & 1 & 2 & 3 & - \\ \hline $ \cosh 0 $ & $ \tanh 0 $ & $ \operatorname{cotanh} 0 $ & & + & - & 0 & &. & END \\ \hline \multicolumn{3}{|c|}{ Degrees $ Q $ Radians } & & $ \sqrt{0} $ & \multicolumn{3}{|c|}{ inassmet } & 8 & CUBAR \\ \hline \end{tabular} Submissions Attempts remaining: 999 (05 per attempt) detailed view Submit Hint Fradbact I give up! Hints: 05 deduction per hint. Hints remaining: 2 Feedback: 0 feduction per feedback. 25\% Part (b) Calculate the total resistance of the circuit in $ \Omega $. $ 25 \% $ Part (c) Calculate the equivalent inductance of the parallel inductors in $ \mathrm{H} $. 25\% Part (d) Find the time constant of the circuit in $ s $.

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Marginal Productivity Consider the Cobb-Douglas production function $f(x, y) = 800x^{0.8}y^{0.2}$. When $x = 800$ and $y = 700$, find (a) the marginal productivity of labor, $\frac{\partial f}{\partial x}$ (b) the marginal productivity of capital, $\frac{\partial f}{\partial y}$

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lorenzo h.