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suppose you have 0.45g of NaC2H3O2 and you want to prepare a buffer with a pH of 4.90. You can either add 0.100M HCl or 0.100M NaOH. Which should add, and how many milliliters should you add

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Organisms and a population may vary with respect to a particular phenotypic trait but in order for that treat to involve it must also be

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How many grams of the weak acid HF (molar mass = 20.01 g/mole) does it take to prepare 705 mL of a solution that has pH = 3.33? $K_a$ (HF) = 7.1 x $10^{-4}$ Please give the answer to 2 decimal places. Answer: 0.00 Check Partially correct Marks for this submission: 2.50/3.00. This submission attracted a penalty of 1

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Which of the following was NOT a result of the Civil Rights movement? A. Civil Rights Act B. Voting Rights Act C. Black Codes Reset Selection Mark for Review What's This?

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It is found that the data given in the following table can be represented with the following equation. y = bx$^m$ a) Use a transformation to linearize this equation b) Use linear regression to estimate the constants, b and m. x \ 0.5 \ 2.4 \ 3.2 \ 4.9 \ 6.5 \ 7.8 y \ 0.8 \ 9.3 \ 37.9 \ 68.2 \ 155 \ 198

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The incidence angle of relative velocity $\beta_1$ of flow at the rotor inlet of a compressor stage is 35 degrees. The flow through the compressor has constant axial velocity of 150 m/s and mass flow rate of 20 kg/s. The rotor turning angle is 10 degrees. Flow enters and exits the stage axially. a. Compute the blade's linear velocity at the mean radius. b. Compute the power required by the compressor stage.

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Journalize the following treasury stock transactions: On August 1, Caleb Corporation purchased 2,000 shares of its $10 par value common stock for $130,000. It will hold these shares in the treasury until resold. On December 1, the corporation sold 1,200 shares of treasury stock for cash at $72 per share.

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How did they come up with 4.5%? How do you know if it's outflow or inflow? 4. This question is based on the following table which shows saving and investment schedules for each of two countries. Real Saving in Country A Saving in Country B Investment Investment in Country A in Country B Interest Rate 2.5% 3.0% 3.5% 4.0% 4.5% 5.0% 330 360 390 420 450 480 730 760 790 820 850 880 760 720 680 640 600 560 860 820 780 740 700 660 Fill in the blanks and underline the correct word in parenthesis Assuming there are no restrictions on the flow of funds between countries, the equilibrium world interest rate will be 4.5%. At that interest rate, Country A will have net capital (outflow, inflow) equal to 150.

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If $u = f(\frac{x}{y}, \frac{y}{z}, \frac{z}{x})$ then find $x\frac{\partial u}{\partial x} + y\frac{\partial u}{\partial x} + z\frac{\partial u}{\partial x}$ Q4. Using Taylor's series expand sin x in the powers of $(x - \frac{\pi}{4})$ up to five terms. Q5. Find a unit normal to the surface $x^2y + 2yz^2 - 8$ at the point $(1, 0, 2)$

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A vertical milling machine is used to cut the inside diameter of a large batch of cylindrical-shaped parts. The hole diameter is 711mm and the length is 355mm. The cutting speed in the operation is 46 m/min and the feed is 0.38mm/rev. The depth of cut is 3.17mm. The parameters of the Taylor equation for the cutting tool in the operation are n=0.25 and C=335m/min. The tool change time is 3 min, and the tooling cost is -$3.50 per cutting edge. The time to load and unload the parts is 14.0 min, and the cost of the machine time is $42.00/hr. Determine the following: What is the current process cycle rate (1 mark)? What is the maximum possible average cycle rate for this job (1 mark)? Management wants to increase the cycle rate by at least 50%. Is it possible? Comment and provide a recommendation to the production manager based on the estimated values of the average cycle rate (3 marks)?

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emma m.