Part D

When solving problems involving stoichiometric coefficients, the first step is to make sure you have a balanced chemical equation. Then, you determine the limiting reagent by using the coefficients from the balanced equation. You can keep track of the amounts of all reactant and products before and after a reaction using an ICF table. Completing the ICF table will also allow you to determine the limiting reagent, and the amount of product formed assumes that the reaction runs to completion with 100% yield. Parts A and C explore these steps in more detail. Let us consider another reaction.

Ammonia and oxygen react to form nitrogen monoxide and water. Construct your own balanced equation to determine the amount of NO and H2O that would form when 3.40 mol  NH3 and 4.71 mol  O2 react.

Express the amounts in moles to two decimal places separated by a comma.

Compute K_e and K_n under the following circumstances:

a. D₁ = $9.20, P₀ = $100, g = 7%, F = $2.00. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
  

b. D₁ = $.18, P₀ = $35, g = 10%, F = $2.50. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
  

c. E₁ (earnings at the end of period one) = $9, payout ratio equals 30 percent, P₀ = $37, g = 3.4%, F = $1.80. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
  

d. D₀ (dividend at the beginning of the first period) = $7, growth rate for dividends and earnings (g) = 5%, P₀ = $63, F = $4. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
  

A student dilutes 50 mL of a phosphoric acid-dihydrogen phosphate buffer solution to a final volume of 100 ml.

Will the pH of the buffer change noticeably? (Use Henderson -Hasselbeck conceptually )

For the same dilution above will the buffer capacity change ?

Calculations: A 50.0 mL sample of a 0.100 M phosphoric acid, H3PO4 is titrated with 0.100 M NaOH.

Identify the major chemical species present and calculate the pH at these four points (first consider the titration curve)

Given : K_a (H₃PO₄)=7.5 x10^-3, K_a(H₂PO₄^-)=6.2x10^-8, K_a(HPO₄^2-)=4.2x10^-13

^{Point 1: after 20.0 mL of NaOH is added}

^{Point 2: after 50.0 mL total of NaOH is added}

^{Point 3: after 75.0 mL total of NaOH is added}

^{Point 4: after 100.0 mL total of NaOH is added}

If you are a Director R&D Clinical Studies

Please answer the following questions No Plagiarism please

Try to use approximately 100 words each question

Please type

4.       What were the challenges in your past and present company?

5.       Can you describe the drug development process?

6.       What step is more promising/ challenging during drug development?

7.       Which step has more ethical issues and how have you overcome them?

8.       What do you suggest to people who want to pursue a career in clinical trials?

9.       How do we approach/ what aspect do we need to consider at the first step?

10.   What is the most difficult part of drug development?

11.   What step in the drug development is most costly?

Suppose that Marta's hourly wage is $20 per hour, her rental property yields $100 per day, and she has 16 hours in a day to allocate between leisure and work.

a. What is her daily budget constraint? Draw it in a diagram.

b. How much can Marta consume if she enjoys 16 hours of leisure?

c. Suppose that the government imposes a 25% income tax. What is her budget constraint now? n the same diagram, using a dashed line, draw the new budget constraint.

d. What happens if the government sets the tax rate to zero on unearned income and on the first $120 of her earnings, but imposes a 25% tax for each dollar earned more than $120? In a new diagram, draw her original (from part (a)) and her new budget constraint.

2,000,000 shares of no-par common stock were authorized; 750,000 shares were issued on January 1, 2019, at $35 per share. 800,000 shares of $100 par value, 7.5% cumulative, preferred stock were authorized; 540,000 shares were issued on January 1, 2019, at $105 per share. No dividends were declared or paid during 2019 or 2020. However, on December 22, 2021, the board of directors of Permabilt Corp. declared dividends of $15,000,000, payable on February 12, 2022, to holders of record as of January 8, 2022. Prepare the journal entries to record each of the below transactions. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.) The issuance of common stock and preferred stock on January 1, 2019. The declaration of dividends on December 22, 2021. The payment of dividends on February 12, 2022.

Now that the turkey has been in the oven for quite some time, it is now time to get the gravy ready. First, you will need to put a circular aluminum sauce pan with a 12-cm diameter and a thickness of 8-mm on the stovetop and turn on the burner. Now you 120-gram mix the gravy contents with 360-grams of water. Assume that the latent heat of evaporation for gravy is similar to that of water, which is ?v=2260 KJ/Kg and that the thermal conductivity constant for aluminum is 220 J/s*m*°c

a) If the rate electric stove top has a heat transfer rate of 2.3 kW, solve for the temperature difference across the bottom of the aluminum pan.

b) Suppose the gravy reaches a boiling point at 100°C. How long will it take all of the gravy to completely “evaporate” if it behaved like water.

These exercises use the normal probability density function and requires the use of either technology or a table of values of the standard normal distribution.

a. The cash operating expenses of the regional phone companies during the first half of 1994 were distributed about a mean of $29.78 per access line per month, with a standard deviation of $2.15. Company A's operating expenses were $29.00 per access line per month. Assuming a normal distribution of operating expenses, estimate the percentage of regional phone companies whose operating expenses were closer to the mean than the operating expenses of Company A were to the mean. (Round your answer to two decimal places.)

b. Repeated measurements of a student's IQ yield a mean of 100, with a standard deviation of 10. What is the probability that the student has an IQ between 96 and 104? (Round your answer to four decimal places.)

Compute the weighted average (round to the nearest cent) for the following table of values:

Also, what is the median dollar value from this data?

Compute the geometric mean return (rounded to 4 decimal places) for the following:

If you invested $1,200, how much would it be worth after 5 years (round to the nearest cent)?

When you answer the question put the 4 answers first, in this order and label like this:

Weighted Average:

Median value from the weighted average problem:

Geometric Mean Return:

What would be the value of $1,200:

And then explain the difference between weighted average and geometric mean.

Periodic inventory by three methods; cost of goods sold The units of an item available for sale during the year were as follows:

Jan. 1 Inventory 30 units at $128

Mar. 10 Purchase 50 units at $138

Aug. 30 Purchase 20 units at $144

Dec. 12 Purchase 100 units at $148

There are 80 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the ending inventory cost and the cost of goods sold by three methods. Round interim calculations to one decimal and final answers to the nearest whole dollar.

Cost of Ending Inventory and Cost of Goods Sold