samithasanju

Azeotropes can be used to shift chemical equilibria by removing products. Treatment of 1-butanol with acetic acid in the presence of sulfuric acid as a catalyst results in formation of butyl acetate and water. The mixture of 1-butanol/butyl acetate/ water forms a ternary azeotrope that boils at 90.7 degree C. This azeotrope separates into two layers; the upper layer is largely butyl acetate, along with 11% 1-butanol, and the lower layer is largely water. Butyl acetate forms by an equilibrium reaction that does not especially favor product formation.

a. Describe an apparatus by which azeotrope formation can be used to drive the equilibrium toward the products, thus maximizing the yield.

b. How would you separate the 1-butanol/butyl acetate mixture that forms the upper azeotropic layer?

n-butanol + acetic acid = n-butyl acetate + H2O

Considering that the reaction produces water in the mechanism, whatreagents could be added to the reaction mixture to enhanceconversion to product? (Specific example)

S1= {B in R2x2| BA=0}

S2= {B in R2x2| AB does not = BA}

S3= {B in R2x2| AB + B = 0}

Give the Schoenflies symmetry point group symbol for each of the following molecules. Please explain!

a) SF5Cl

b) 1,2-dichlorobenzene

c) 1,3-dichlorobenzene

d) 1,4-dichlorobenzene

e) 1,3,5-trichlorobenzene

f) 1,2,3-trichlorobenzene

g) 1,2,4-trichlorobenzene

h) OPCl3

i) BFClBr where B is the central atom

j) Cyclopropane

k) P4

Will Rate the best answer, Thanks!

The vapor pressures of 1, 2-diphenylethane, p-dichlorobenzene, 1, 3, 5-trichlorobenzene are 0.06, 11.2, and 1.4 torr, respectively, at their melting points (52-54 degree C). Explain which compound is likely to be sublimed most rapidly at a reduced pressure of 15 torr and a temperature of 40 degree C.

What is 1+1?

Tenure for public school teachers (K-12) might be popular/desirable to taxpayers and elected officials. Why?

Why might higher education need regulation and how does it relate to imperfect information?

Do you think college adds human capital or is just a signal. Define the difference and justify your opinion

Consider an insurance policy of full coverage (all expenses covered). When a person is hospitalized, the patient bears no financial cost if her stay is prolonged. This is likely to lead the person to overconsume any medical care that has any benefit if the insurance company incurs the expense. Using the figure below answer questions. The person’s demand for health service is D1 and the marginal cost of health service/care is $10 per unit.

$

D1 D2

P = $10

200 Medical Care

(i). if the person does not have insurance, how much medical care would he consume?

(ii). With the full coverage insurance, how much would he consume?

(iii). How much is the welfare loss or excess burden? Shade the excess burden in the figure.

(iv). The insure person is required to pay 20% of the cost. How much medical care would he consume?

(v). Calculate the excess burden or welfare loss in this case.

Luncheon club dilemma: Public debt under majoritarian democracy and welfarism.

Luncheon club dilemma: A group of diners used to eat and pay separately. Each person has the demand function for lunch given by: p = 20 – 2x. Let’s imagine x denotes number of sushi. The supply condition is given by a constant marginal cost of $10 a piece: mc = 10.

a.. How many pieces of sushi would each diner order?

Now, they form a luncheon club of ten persons. They eat together once a month, each selecting from the menu. The bill is the sum of the total orders and will be divided evenly among the diners.

b. Consider a stand-in diner who orders one more piece than he used order and pay separately. How much is the total bill if he is the only one who orders additional sushi? How much does each person pay?

c. Now, every diner orders one more sushi. How much is the total bill and how much does each person pay?

d. Would diners stop after one more sushi? When would they stop – after how many additional sushi, would they stop?

Compression Rate of 100-120 per minute should be performed when providing CPR.

1-True

2-False

If a health care bill required every employer to provide health insurance to any employee working more that 20 hours per week – what might be an unintended consequence? (2 points)

Tenure for public school teachers (K-12) might be popular/desirable to taxpayers and elected officials. Why? (5 points)

If a health care bill required every employer to provide health insurance to any employee working more that 20 hours per week – what might be an unintended consequence?

If one compares graduation rates of Charter schools to public schools and finds higher rates in Charter schools does that mean charter schools are more effective educators yes or no and why?

Suppose after graduation you take a job with an employer that offers to pay full tuition for employees wishing to return to school to get an MBA degree during non-work hours. You are not required to continue working for the firm after getting your MBA. What type of training is this? Who do you think actually pays for it?

An evil man is tormenting a small city of 100. Lydia who is the president’s daughter says the city has to hire security guards with guns to protect the city from the evil man. Explain why the citizens of the city have not hired their own security guards with guns and why Lydia has to convince the citizens to donate money to help in hiring for protection

I titrated 0.02061 M Na2S2O3 with a solution of vitamin C (0.1 g), 15 mL water, 30 mL of 0.00946 M KIO3, and KI (1 g). For trials 3, it took these volumes of Na2S2O3 to reach the endpoint: 4.71 mL, 4.68 mL, and 4.66 mL. Determine the moles of vitamin C presented in the solution for each trial of the analysis and calculate the % by mass of ascorbic acid in the vitamin C sample for each trial of the analysis. Also, this equation is given: IO3 - (aq) + 8 I- (aq) + 6H+ (aq) → 3 I3 - (aq) + 3 H2O(l)

The Ksp isn't given

A saturated solution of calcium iodate, Ca(IO3)2, is created by suspending a small amount of pure solid of Ca(IO3)2 in 50.0 mL of distilled water. After allowing equilibrium to be established, a 10.0-mL sample of the saturated solution is pipeted into an Erlenmeyer flask, and about 20 mL of de-ionized water is added to this sample, followed by about 1 cm3 of solid KI and 1 mL of 2.0 M HCl. The addition of excess KI and HCl converts all of the IO3- present in the sample to molecular iodine according to the following equation.IO3-(aq) + 5 I-(aq) + 6H+(aq) ? 3 I2(aq) + 3H2O(l) (Eqn-1) The iodine produced by the above reaction is then titrated with 0.0250 M Na2S2O3 using starch indicator, which requires 29.0 mL of 0.0250 M Na2S2O3 to reach end-point. The stoichiometric reaction between iodine and thiosulfate is represented by the following net ionic equation.I2(aq) + 2 S2O32

I'm trying to answer some questions from an article about the iodine clock reaction using these reagents: Potassium iodate (KIO3), Sodium bisulfite (NaHSO3), Sulfuric acid (H2SO4) - this is the catalyst, and a starch indicator.

This process takes place like this:

IO3- + 3HSO3- -slow----> I- + 3SO4 2- + 3H+

IO3- + 5I- + 6H+ -slow---> 3I2 + 3H2O

I2 + HSO3- + H2O -fast----> 2I- + SO4 2- + 3H+

I2 + starch ----> blue-black complex

My question is how does the Arrhenius Equation relate to the iodine clock reaction?

tandardisation of sodium thiosulphate solution with potassium iodate

Sodium thiosulphate is not of ultra-high purity, and hence does not qualify to be used as a primary standard in titrations. It should therefore be standardised
against a primary standard, potassium iodate (KIO3), in order to determine its accurate concentration. The standardisation involves two redox equations
described below:
2S2O32–+ I2 → S4O62- + 2I-

IO3- + 5I- + 6H+ → 3I2 + 3H2O
In the second equation IO3- plays an oxidative role, where I- ions are oxidisedto I2 under acidic conditions, causing the solution to turn a brownish colour.
The iodine produced is then titrated with Na2S2O3 solution, using starch as an indicator. The starch indicator is not added until the brownish colour, due to
iodine, has changed to pale yellow. When the starch is added to the solution, the yellow colour changes to blue-black. The end point in the titration is reached
when a drop of the thiosulphate causes the solution to become colourless.

The aim of this experiment is to determine the actual concentration of the thiosulfate solution (in mol/L) using potassium iodate as a standard. The molecular mass of KIO3 is 214 g mol-1.

Reagents: KIO3 (A.R.)
20 g Kl (iodate free) (for use in Experiments 3 and 5)
1 M HCI solution
0.1 M Na2S2O3 stock solution
Starch indicator solution

(a) Calculate the mass of A.R. KIO3 needed to prepare a 0.016 M solution in a 250 mL volumetric flask. Ask a demonstrator to check your calculations.
(b) Following the procedure given in Experiment 1, weigh by difference the KIO3, as supplied in the glass vial, accurately to the nearest 0.1 mg. (Use
a 4-place balance.)
(c) Transfer the weighed KIO3 into a 250 mL volumetric flask, dissolve it, and then make to the mark with deionized water. Shake to mix well.
(d) Fill the burette with 0.1 M Na2S2O3 stock solution, ensuring that there is no air pocket in the burette tip.
(e) Pipette a 25 mL aliquot of the KIO3 solution into each of three 250 mL conical flasks.
(f) Treat each aliquot individually from this point. Weigh 2 g Kl into a weighing beaker and add it to the conical flask, followed by 10 mL of 1 M HCI.

(g) Immediately titrate the liberated iodine with the 0.1 M Na2S2O3 stock solution. When the colour of the solution becomes pale yellow, dilute to 100 mL with deionized water and add 3 to 5 drops of starch indicator solution. Continue the titration until the colour changes from blue to colourless.

QUESTIONS:

Calculate the molarity of sodium thiosulfate.

A standard iodate solution is prepared at 22.0 °C by dissolving 0.9123 g (uncorrected mass) of KIO3 with deionized water in a 499.92 mL volumetric flask.To standardize the Na2S2O3 solution, a 10.005 mL aliquot of the KIO3 solution is acidified, treated with excess KI, an d titrated with Na2S2O3, requiring 22.05 mL to reach the end point. Finally, a 10.005 mL aliquot of unknown Cu solution is reduced with excess KI. The liberated iodine requires 31.46 mL of Na2S2O3 solution to reach the end point. Calculate the unknown Cu concentration in g/L.

A 20.0 mL sample of NaIO3 was treated with an excess of KI and HCl and the iodine produced titrated with 0.05125 M Na2S2O3. 19.35 mL of Na2S2O3 solution were required to reach a starch?iodine endpoint. What was the concentration of the NaIO3? (Hint: start with a balanced equation for NaIO3)

What is the concentration of iodine in 1 mL of 0.1 M KI solution?

[A] Phosphorus
[B] Arsenic
[C] Antimony
[D] Indium

13. Which of the following is correct about tincture of iodine?

[A] It is a solution of iodine in ethanol
[B] It is a solution of iodine in Hydrochloric acid
[C] It is a solution of iodine in Nitric acid
[D] None of the above

[A] Charge on a proton
[B] Charge on an electron
[C] Charge to mass ratio of an electron
[D] Mass of a Hydrogen atom

Who is the second father of sociology?

1. Auguste Comte
2. Emile Durkheim
3. Herbert Spencer
4. Max Weber

Doctors often charge patients different amounts depending on their judgement concerning the patients’ ability to pay. What implications does this have for exchange efficiency?

Month-end payroll accruals: you work for a large multinational organization and the Canadian subsidiary is being spun off into a separate organization. You will need to start doing some of the accounting functions that were previously handled by the head office in Britain you have been asked by the controller to prepare a memo with the different monthly accruals required for the biweekly payroll and how each will be accrued

Give at least five concepts learned in RA 9163 and be able to define each

Question 9

(a) Explain the difference between average, total, and marginal revenue? What is the shape of the total and marginal revenue curves for the individual perfectly competitive firm? [5marks]

(b) Why does price equal marginal revenue for the perfectly competitive firm? What is the relationship to the demand curve for the firm? [5marks]

(c) Why is the level of output at which marginal revenue equals marginal cost the profitmaximizing output? [5marks]

(d) What conditions are necessary to determine if the purely competitive firm should produce in the short run? State the marginal revenue and marginal cost conditions and the total revenue and total cost conditions.

A perfectly competitive firm faces a market-determined price of $25 for its product, and its total cost for different quantities of output are shown below.  Answer each question (a through g) below.  The correct answer to each is worth five points.  If you get correct answers to each question a through g, you will receive 35 points, which is an extra two points over the basic 33 points for a Roman numeral question.

1.  The firm’s total costs are given below.  Fill in columns 3 and 4 for average total cost and marginal cost.
2. Fill in columns 5 and 6 for marginal revenue and profit margin.
3. How much output should the competitive firm produce?  Explain why.
4. Draw the marginal cost, average total cost curve, and marginal revenue curve for the firm.
5. Fill in column (7) on total profit.  Does your answer from column (7) agree with your answer to part c?  If not, explain why.
6. Identify the profit maximizing level of output on your diagram from part d.
7. Suppose the demand for the industry product decreases and the price falls to $14.  What quantity should the firm produce now?  How much is profit? 

(1)                       (2)             (3)             (4)                   (5)                   (6)                      (7)

Quantity          TC          ATC             MC                  MR      profit per unit     Total profit

000                  1000

100                  2000

200                  3300

300                  4800

400                  7000

500                  8000

You are a new recruit in the finance division of LargeCompany Plc. Your finance director has asked you to review the company’s capital structure when the amount of debt is changed. She has provided you following information from last year annual report in ‘000 Short Term Debt/Current Portion of Long Term Debt £1,700,000 Long Term Debt £9,700,000 Total Equity £18,000,000 Shares Outstanding 1,700,000 Further, you collected following market information from the New Financial Times. Stock Price (per share) £ 27 Current Yield to Maturity on outstanding Bond 0.90% Cost of unlevered equity is 10 %

. You would like to show your understanding of capital structure that you learnt in your corporate finance course In particular, you want to demonstrate

A) in a perfect capital market, a firm’s choice of capital structure is unimportant. (30 Marks)

B) in “real world” market imperfections like taxes can not be ignored. As interest payments create a valuable tax shield, the stock price should increase if firm decides to increase its debt i.e. higher leverage higher firms value (30 Marks)

C) your knowledge of existing literature on capital structure theories (20 Marks)

Please follow the guidelines below while answering

For A: you are suggested to

1. Compute the market Debt to Equity ratio.

2. Compute the cost of levered equity based on market Debt to Equity ratio

. 3. Compute the current weighted average cost of capital (WACC).

4. Repeat steps 2 and 3 for Scenario i) issue £1 billion in debt to repurchase stock, and Scenario ii) issue £1 billion in stock to repurchase debt.

Briefly comment the results.

Note: i. approximate the market value of debt by the book value of debt

ii. debt includes Long-Term Debt and Short-Term Debt/Current Portion of Long-Term Debt.

iii. existing yield on the outstanding bond can be used as cost of debt

iv. assume cost of debt capital remains constant

For B: you are suggested to Examine the impact of

a) issuing £1 billion in new debt (adding a modest level of debt) and

b) issuing £5 billion in new debt (i.e. adding a higher level of debt).

In both the cases, you plan to use the proceeds to repurchase stock.

Note: i. assume a tax rate of 40%

ii. begin by analysing the scenario with £1 billion in new debt. Assuming the company plans to keep this new debt outstanding forever, determine the present value of the tax shield of the new debt.

iii. find out new market value of equity. new market value of equity = existing market value + tax shield amount

iv. find out new market value of equity after repurchase

v. find out the new share price vi. new number of shares outstanding = no of shares outstanding (given) less number of shares repurchased

vii. now find out Debt to Equity ratio based on a) book values and b) market values

viii. repeat ii – vii for £5 billion new debt issuance

For C: you are suggested to Read and review journal articles related to Trade off, Asymmetric of the information hypothesis, Pecking order theory, Signaling theory, Agency cost theory, and Market timing theory.

If m ≤ f(x) ≤ M for a ≤ x ≤ b, where m is the absolute minimum and M is the absolute maximum of f on the interval [a, b], then m(b − a) ≤ b f(x) dx a ≤ M(b − a). Use this property to estimate the value of the integral. π/9 5 tan(3x) dx π/12 m( 3π 108​)

Q#3. The M& M capital structure theory in chapter 15 persuasively argues that the optimal debt is not a 0.0 % debt to equity ratio (i.e., firms should use some debt). The chapter 15 shows that, consistent with M&M theories, the average long-run debt to equity ratio in many different industries ranges from 23% to 177%. Yet some technology firms, such as Microsoft, google, and Apple, do not use any long-term debt or almost 0.0% long-term debt. Please explain whether it makes financial sense for such firms to use no debt. You would want to use your understanding of capital structure material in chapter 15, especially signaling and asymmetric information theories, in your answers. Limit your answers to no more than ten (10) sentences.

Textbook: Financial Management: Theory and Practice, by Brigham and Ehrhardt 14^th Ed.

The method of standard additions was used to determine nitrite in a soil sample. An aliquot of 1.00mL of the sample was mixed with 24mL of a colorimetric reagent, and the nitrite was converted to a color product with a blank-corrected absorbance of 0.300. To 50mL of the original sample, 1.00mL of a standard solution of 0.001M nitrite was added. the same color-forming procedure was followed and the new absorbance was 0.530. What was the concentration of nitrite in the original undiluted sample?

Wilsons is opening a new warehouse in Leeds to support its six sports retail outlets in the North of England. The company already had warehouses at two UK sites, but aggressive expansion plans have seen 12 new stores opening over the last three years. Dave Armitage is part of Wilsons' head office HR team and has been tasked with managing the recruitment for the warehouse, which is due to open in six months. Based on the existing warehouse staffing structure, a number of different job roles have been identified:
• Warehouse operative
• Shift supervisor
• Warehouse manager
• Staff canteen supervisor
• Staff canteen assistant

Dave has typically dealt with recruitment to management positions both at the head office and the stores and has been very successful in attracting applicants using the company's website and LinkedIn. Yet, with one month to go before the warehouse is due to be up and running, there are still 37 vacancies for warehouse operatives as well as two canteen assistants.

QUESTIONS
1. Why are Dave's usual recruitment methods unsuccessful for some roles?
2. The new warehouse manager gave his word a month before the warehouse was due to open. Which recruitment method do you think would be most appropriate at this stage? What are the drawbacks of these methods?
3. Dave reviewed the recruitment process for the warehouse and concluded that a mixed-methods approach would have been more effective in this case. What issues could this have presented?

If the concentration of phage in the original sample was markedly increased from the concentration that you actually received for this experiment, how could you ensure that you had between 30-300 plaques on your plate

While working in a pathology lab, you are presented with an equine blood sample (2n=64) that is suspected to have a genetic abnormality. You decide to karyotype the sample and diagnose trisomy 30.

1. Assume two hypothetical genes A and B are located on chromosomes 29 and 30 respectively. How many alleles for each gene will be present in the Primary oocyte, secondary oocyte and ovum that produced the animal with the abnormal karyotype indicated above – Provide answers for all possible scenarios