OC userin Chemistry·13 Nov 201758. Which buffer system is the best choice to create a buffer with pH = 9.00? For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. HF/KF HNO2/KNO2 NH3/NH4Cl HCIO/KCIO
OC userin Chemistry·10 Nov 201794. The solubility of copper(I) chloride is 3.91 mg per 100.0 mL of solution. Calculate Ksp for CuCl.
OC userin Accounting·12 Nov 2017PROBLEM 2-21 Cost Classification (L02-1, LO2-3, L02-4] Listed below are costs found in various organizations. 1. Property taxes, factory. 2. Boxes used for packaging detergent produced by the company. 3. Salespersons' commissions 4. Supervisor's salary, factory. 5. Depreciation, executive autos. 6. Wages of workers assembling computers. 7. Insurance, finished goods warehouses. 8. Lubricants for production equipment. 9. Advertising costs. 10. Microchips used in producing calculators. 11. Shipping costs on merchandise sold. 12. Magazine subscriptions, factory lunchroom. 13. Thread in a garment factory. 14. Billing costs. 15. Executive life insurance. 16. Ink used in textbook production. 17. Fringe benefits, assembly-line workers. 18. Yarn used in sweater production. 19. Wages of receptionist, executive offices. Required: Prepare an answer sheet with column headings as shown below. For each cost item, indicate whether it would be variable or fixed with respect to the number of units produced and sold; and then whether it would be a selling cost, an administrative cost, or a manufacturing cost. If it is a manufacturing cost, indicate whether it would typically be treated as a direct cost or an indirect cost with respect to units of product. Three sample answers are provided for illustration. Variable or Fixed Selling Cost Administrative Cost Manufacturing (Product) Cost Direct Indirect Cost Item Direct labor ............. Executive salaries .. Factory rent ........... TI TI
OC userin Chemistry·10 Nov 201715. Explain how a chemical reaction occurs according to the coll- sion model. Explain the meaning of the orientation factor in this model.
OC userin Chemistry·11 Nov 2017125. Use the concepts in this chapter to obtain an estimate for the number of atoms in the universe. Make the following assump- tions: (a) All of the atoms in the universe are hydrogen atoms in stars. (This is not a ridiculous assumption because over three-fourths of the atoms in the universe are in fact hydrogen. Gas and dust between the stars represent only about 15% of the visible matter of our galaxy, and planets compose a far tinier fraction.) (b) The sun is a typical star composed of pure hydro- gen with a density of 1.4 g/cm and a radius of 7 x 108 m. (c) Each of the roughly 100 billion stars in the Milky Way gal axy contains the same number of atoms as our sun. (d) Each of the 10 billion galaxies in the visible universe contains the same number of atoms as our Milky Way galaxy.
OC userin Accounting·11 Nov 2017PROBLEM 6-22 Prepare and Reconcile Variable Costing Statements (L06-1, L06-2, L06-3] Denton Company manufactures and sells a single product. Cost data for the product are given below: Variable costs per unit: Direct materials ..., Direct labor ...... Variable manufacturing overhead .......... Variable selling and administrative ........ Total variable cost per unit .............. Fixed costs per month: Fixed manufacturing overhead ............ Fixed selling and administrative ... Total fixed cost per month ............... ""31 $315,000 245,000 $560,000 The product sells for $60 per unit. Production and sales data for July and August, the first two months of operations, follow: Units Produced Units Sold July ....... ..... August ....... 17,500 17,500 15,000 20,000 The company's Accounting Department has prepared absorption costing income statements for July and August as presented below: ........ Sales ...... Cost of goods sold .... Gross margin Selling and administrative expenses . . . . . . . . . . Net operating income .......... ......... July $900,000 600,000 300,000 290,000 $ 10,000 August $1,200,000 800,000 400,000 305,000 $ 95,000 Required: 1. Determine the unit product cost under: a. Absorption costing. b. Variable costing. 2. Prepare contribution format variable costing income statements for July and August 3. Reconcile the variable costing and absorption costing net operating income figures. 4. The company's Accounting Department has determined the company's break-even point to be 16,000 units per month, computed as follows: Fixed cost per month $560,000 16,000 units Unit contribution margin $35 per unit "I'm confused," said the president. "The accounting people say that our break-even point is 16,000 units per month, but we sold only 15,000 units in July, and the income statement they prepared shows a $10,000 profit for that month. Either the income statement is wrong or the break-even point is wrong." Prepare a brief memo for the president, explaining what happened on the July absorption costing income statement.
OC userin Physics·11 Nov 20175.25. BIO The Trendelenburg Position. After emergencies with major blood loss, a patient is placed in the Trendelenburg po- sition, in which the foot of the bed is raised to get maximum blood flow to the brain. If the coefficient of static friction between a typical patient and the bedsheets is 1.20, what is the maximum angle at which the bed can be tilted with respect to the floor be- fore the patient begins to slide?
OC userin Accounting·11 Nov 2017EXERCISE 2-7 Differential, Opportunity, and Sunk Costs [LO2-7] Northwest Hospital is a full-service hospital that provides everything from major surgery and emergency room care to outpatient clinics. The hospital's Radiology Department is consider- ing replacing an old inefficient X-ray machine with a state-of-the-art digital X-ray machine. The new machine would provide higher quality X-rays in less time and at a lower cost per X-ray. It would also require less power and would use a color laser printer to produce easily readable X-ray images. Instead of investing the funds in the new X-ray machine, the Laboratory Department is lobbying the hospital's management to buy a new DNA analyzer. Required: For each of the items below, indicate by placing an X in the appropriate column whether it should be considered a differential cost, an opportunity cost, or a sunk cost in the decision to replace the old X-ray machine with a new machine. If none of the categories apply for a particular item, leave all columns blank. Differential Cost Opportunity Cost Sunk Cost Item Ex. Cost of X-ray film used in the old machine 1. Cost of the old X-ray machine.. 2. The salary of the head of the Radiology Department.... 3. The salary of the head of the Pediatrics Department.... 4. Cost of the new color laser printer 5. Rent on the space occupied by Radiology ........... 6. The cost of maintaining the old machine.. ........... 7. Benefits from a new DNA analyzer ................. 8. Cost of electricity to run the X-ray machines ........ ......
OC userin Physics·9 Nov 2017Q5.9 A crate slides up an inclined ramp and then slides down the ramp after momentarily stopping near the top. There is kinetic friction between the surface of the ramp and the crate. Which is greater? () The crate's acceleration going up the ramp; (ii) the crate's acceleration going down the ramp; (iii) both are the same. Explain.
OC userin Physics·9 Nov 2017Figure E5.8 5.8 A 1130-kg car is held in place by a light cable on a very smooth (frictionless) ramp (Fig. E5.8). The cable makes an angle of 31.0° above the sur- face of the ramp, and the ramp itself rises at 25.0° above the horizontal. (a) Draw a free-body diagram for the car. (b) Find the tension in the cable. (c) How hard does the surface of the ramp push on the car? 25.00
OC userin Chemistry·9 Nov 201776. Consider the reaction: 12(g) + Cl2(g) = 2 ICI(g) Kp = 81.9 at 25°C Calculate AGxn for the reaction at 25°C under each of the following conditions: a. standard conditions b. at equilibrium c. Pa = 2.55 atm; R = 0.325 atm; Pa, = 0.221 atm
OC userin Physics·11 Nov 201731.13" A150-resistor is connected in series with a 0.250-H inductor and an ac source. The voltage across the resistor is UR = (3.80 V)cos[(720 rad/s)t]. (a) Derive an expression for the circuit current. (b) Determine the inductive reactance of the inductor. (c) Derive an expression for the voltage UL across the inductor.
OC userin Chemistry·9 Nov 20175. What is the pH of a buffer solution when the concentrations of both buffer components (the weak acid and its conjugate base) are equal? What happens to the pH when the buffer contains more of the weak acid than the conjugate base? More of the con- jugate base than the weak acid?
OC userin Physics·9 Nov 201714.8. In a physics lab, you attach a 0.200-kg air-track glider to the end of an ideal spring of negligible mass and start it oscillating. The elapsed time from when the glider first moves through the equilibrium point to the second time it moves through that point is 2.60 s. Find the spring's force constant.
OC userin Chemistry·8 Nov 201739. Give each ionic compound an appropriate name. a. Sno b. Cr,S3 C. RbI d. BaBr2
