In paper chromtography, what is the nature of the attractions between the stationary phase (cellulose) and the moving phase (hydrochloric acid/water/acetone) and the species ( Zn2+, Co2+, Cu2+, Cd2+ , Fe3+, and Ni2+ in two unknown solutions)  being separated, in particular what affects the Rf values and how?

Note: Filter paper (Whatman #1) serves as the stationary phase, and the mobile phase consists of a mixture of acetone and 6 M hydrochloric acid. A single spot of the mixture to be analyzed is applied near one edge of a sheet of filter paper. A spot of solution containing each of the cations that might be in the unknown mixture is also placed near the edge of the same sheet for comparison. The treated strip is then placed in a covered jar or beaker (which acts as a developing chamber) containing a shallow layer of the solvent mixture (see Figure 3). Since filter paper is very permeable to the solvent, the solvent begins to rise up the strip by capillary action. The various spots on the developed chromatogram will be highlighted by treatment with several chemical reagents to enhance their color. The reagents to be used are ammonia, dimethylglyoxime (DMG), and 8–hydroxyquinoline (oxine)

In paper chromotography, what form are the metals ( Zn2+, Co2+, Cu2+, Cd2+ , Fe3+, and Ni2+) ions likely to exist in the moving phase (water/hydrochloric acid/acetone) and what groups in the structure of the stationary phase (cellulose) are interacting with the moving ions in solution?

Note: Filter paper (Whatman #1) serves as the stationary phase, and the mobile phase consists of a mixture of acetone and 6 M hydrochloric acid. A single spot of the mixture to be analyzed is applied near one edge of a sheet of filter paper. A spot of solution containing each of the cations that might be in the unknown mixture is also placed near the edge of the same sheet for comparison. The treated strip is then placed in a covered jar or beaker (which acts as a developing chamber) containing a shallow layer of the solvent mixture (see Figure 3). Since filter paper is very permeable to the solvent, the solvent begins to rise up the strip by capillary action. The various spots on the developed chromatogram will be highlighted by treatment with several chemical reagents to enhance their color. The reagents to be used are ammonia, dimethylglyoxime (DMG), and 8–hydroxyquinoline (oxine).

In paper chromtography, what is the nature of the attractions between the stationary phase (cellulose) and the moving phase (hydrochloric acid/water/acetone) and the species ( Zn2+, Co2+, Cu2+, Cd2+ , Fe3+, and Ni2+ in two unknown solutions)  being separated, in particular what affects the Rf values and how?

Note: Filter paper (Whatman #1) serves as the stationary phase, and the mobile phase consists of a mixture of acetone and 6 M hydrochloric acid. A single spot of the mixture to be analyzed is applied near one edge of a sheet of filter paper. A spot of solution containing each of the cations that might be in the unknown mixture is also placed near the edge of the same sheet for comparison. The treated strip is then placed in a covered jar or beaker (which acts as a developing chamber) containing a shallow layer of the solvent mixture (see Figure 3). Since filter paper is very permeable to the solvent, the solvent begins to rise up the strip by capillary action. The various spots on the developed chromatogram will be highlighted by treatment with several chemical reagents to enhance their color. The reagents to be used are ammonia, dimethylglyoxime (DMG), and 8–hydroxyquinoline (oxine).

Calculate cost of goods sold and ending inventory for Emergicare’s bandages orders using FIFO, LIFO and average cost. There are 38 units in ending inventory. (Do not round intermediate calculations, such as average cost per unit values. Round your answers to the nearest cent.) Date Units purchased Cost per unit Total cost January 1 54 $ 7.50 $ 405.00 April 1 49 6.75 330.75 June 1 64 6.50 416.00 September 1 59 7.00 413.00 Total 226 $ 1,564.75. FIFO $ Cost of goods sold $ Ending Inventory    LIFO $ Cost of goods sold $ Ending Inventory    Average Cost $ Cost of goods sold $ Ending Inventory

Sager Company manufactures variations of its product, a technopress, in response to custom orders from its customers. On May 1, the company had no inventories of work in process or finished goods but held the following raw materials.

On May 4, the company began working on two technopresses: Job 102 for Worldwide Company and Job 103 for Reuben Company.

1. Purchased raw materials on credit and recorded the following information from receiving reports and invoices.

Receiving Report No. 426, Material M, 250 units at $250 each.
Receiving Report No. 427, Material R, 90 units at $180 each.

Record these purchases with a single journal entry. Enter the receiving report information on the materials ledger cards.

2. Requisitioned the following raw materials for production.

Requisition No. 35, for Job 102, 135 units of Material M.
Requisition No. 36, for Job 102, 72 units of Material R.
Requisition No. 37, for Job 103, 70 units of Material M.
Requisition No. 38, for Job 103, 38 units of Material R.
Requisition No. 39, for 15 units of paint.

Enter amounts for direct materials requisitions on the materials ledger cards and the job cost sheets. Enter the indirect materials amount on the materials ledger card.

3. Received the following employee time tickets for work in May.

Time tickets Nos. 1 to 10 for direct labor on Job 102, $90,000.
Time tickets Nos. 11 to 30 for direct labor on Job 103, $65,000.
Time tickets Nos. 31 to 36 for equipment repairs, $19,250.

Record direct labor from the time tickets on the job cost sheets.

4. Paid cash for the following items during the month: factory payroll, $174,250, and miscellaneous overhead items, $102,000. Use the time tickets to record the total direct and indirect labor costs.
5. Finished Job 102 and transferred it to the warehouse. The company assigns overhead to each job with a predetermined overhead rate equal to 80% of direct labor cost.

Enter the allocated overhead on the cost sheet for Job 102, fill in the cost summary section of the cost sheets.

6. Delivered Job 102 and accepted the customer’s promise to pay $400,000 within 30 days.
7. Applied overhead cost to Job 103 based on the job’s direct labor to date.

Required:
Complete the materials ledger cards for Material M, Material R, and paint using the information given in part a and b. Complete the job cost sheets for Jobs 102 and 103 using the information given in part a, b, c and e. Prepare journal entries for part a through g.

Complete the job cost sheets for Jobs 102 and 103 using the information given in part a, b, c and e.

10.1Document for Analysis: Poor Persuasive Request Inviting Speaker to Discuss Seven Cardinal Sins in Food Service

(L.O. 1–3)

The following letter from a program chair strives to persuade a well-known chef to make a presentation before a local restaurant association. But the letter is not very persuasive. How could this message be more persuasive? What reader benefits could it offer? What arguments could be made to overcome resistance? How should a persuasive message conclude?

Your Task Analyze the following invitation and list its weaknesses, and write a revision.

Current date

Ms. Danielle Watkins

The Beverly Hills Hotel

9641 Sunset Boulevard

Beverly Hills, CA 90210

Dear Ms. Watkins:

We know you are a very busy hospitality professional as chef at the Beverly Hills Hotel, but we would like you to make a presentation to the San Francisco chapter of the National Restaurant Association. I was asked to write you since I am program chair.

I heard that you made a really good presentation at your local chapter in Los Angeles recently. I think you gave a talk called “Avoiding the Seven Cardinal Sins in Food Service” or something like that. Whatever it was, I'm sure we would like to hear the same or a similar presentation. All restaurant operators are interested in doing what we can to avoid potential problems involving discrimination, safety at work, how we hire people, etc. As you well know, operating a fast-paced restaurant is frustrating—even on a good day. We are all in a gigantic rush from opening the door early in the morning to shutting it again after the last customer has gone. It's a rat race and easy to fall into the trap with food service faults that push a big operation into trouble.

Enclosed please find a list of questions that our members listed. We would like you to talk in the neighborhood of 45 minutes. Our June 10 meeting will be in the Oak Room of the Westin St. Francis Hotel in San Francisco and dinner begins at 7 p.m.

How can we get you to come to San Francisco? We can only offer you an honorarium of $200, but we would pay for any travel expenses. You can expect a large crowd of restaurateurs who are known for hooting and hollering when they hear good stuff! As you can see, we are a rather informal group. Hope you can join us!

Sincerely,

1. Find the maximum of the following total revenue function (TR) by finding out (a) the output ?∗ value where the first order condition is satisfied; and (b) the maximum total revenue.

??(?)=32?−?2

2. Find the maximum of the following profit function by finding out (a) the output ?∗ value where the first order condition is satisfied; and (b) the maximum profit.

?(?)=−?33−5?2+2000?−326.

3. Find the minimum of the average cost function given following total cost function by finding out (a) the output ?∗value where the first order condition is satisfied; and (b) the minimum average cost.

??(?)=?3−21?2+500?

4. Given the following total revenue function ??(?) and the total cost function ??(?), maximize profit ?(?) by following steps

(a) set up the profit function

?=??(?)−??(?)

(b) the output value where the profit is at a relative extremum; and

(c) the maximum profit value.

??(?)=4350?−13?2

??(?)=?3−5.5?2+150?+675.

(please answer all)

Q1

The production function of a competitive firm is q = 4x₁^0.5x₂^0.5. The prices of its inputs are p₁ = $1 and p₂ = $36. The firm's marginal cost is:

A. None of the other answers is correct.

B. Constant and equal to 24.

C. Constant and equal to 3.

D. Decreasing.

E. Increasing.

Q2

Which of the following statements about a firm's cost curves is true?

A. The marginal cost curve passes through the minimum of the average fixed cost curve.

B. More than one of the other answers is correct.

C. The area under the marginal cost curve measures total fixed cost.

D. The average variable cost curve must be U-shaped.

E. If the average cost curve is U-shaped, the marginal cost curve passes through its minimum point.

Q3

Which of the following statements is not necessarily true when a competitive firm chooses its output level to maximise its profit in the short run? (Assume that marginal cost is not constant and is well defined at all levels of output.)

A. Price is at least as great as average variable cost.

B. Total revenue is at least as great as total cost.

C. Marginal cost is increasing.

D. Price is equal to marginal cost.

E. Marginal cost is at least as great as average variable cost.

assume a company incurs 100,000 for total variable costs and 150000 for total fixed costs to produce 10000 units. what would the total cost be to produce 12000 units?