13. a) A generic salt, AB, has a molar mass of 321 g/mol and a solubility of 8.80 g/L at 25 °C. What is the Ksp of this salt at 25 °C?

b) The Ksp of manganese(II) hydroxide, Mn(OH)2, is 2.00 × 10-13. Calculate the molar solubility of this compound.

c) Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 9.73? The Ksp of Fe(OH)2 is 4.87×10-17.

d) What concentration of SO32– is in equilibrium with Ag2SO3(s) and 2.90 × 10-3 M Ag ? The Ksp of Ag2SO3 can be found here.

In a saturated aqueous solution of CaF2, the calcium ion concentration is 0.000215 M and the fluoride ion concentration is 0.000431 M. Calculate the solubility product, Ksp, for CaF2.

e) The Ksp of lanthanum fluoride, LaF3, is 2.00 × 10-19. Calculate the molar solubility of this compound.

f) The Ksp of cadmium carbonate, CdCO3, is 1.0 × 10-12. Calculate the solubility of this compound in g/L.

A second question arises from the data: “Is secchi depth related to P concentrations in the study lakes?” Using excel, choose the appropriate test to address this research question and interpret the results. Produce an appropriate figure for these data showing all relevant information

Travis Industries plans to issue perpetual preferred stock with an $11.00 dividend. The stock is currently selling for $103.00, but flotation costs will be 9% of the market price, so the net price will be $93.73 per share. What is the cost of the preferred stock, including flotation?

Kahn Inc. has a target capital structure of 45% common equity and 55% debt to fund its $12 billion in operating assets. Furthermore, Kahn Inc. has a WACC of 14%, a before-tax cost of debt of 12%, and a tax rate of 25%. The company's retained earnings are adequate to provide the common equity portion of its capital budget. Its expected dividend next year (D₁) is $3, and the current stock price is $26.

1. What is the company's expected growth rate?

2. If the firm's net income is expected to be $1.0 billion, what portion of its net income is the firm expected to pay out as dividends? Do not round intermediate calculations. (Hint: Refer to Equation below.)

   Growth rate = (1 - Payout ratio)ROE

Travis Industries plans to issue perpetual preferred stock with an $11.00 dividend. The stock is currently selling for $103.00, but flotation costs will be 9% of the market price, so the net price will be $93.73 per share. What is the cost of the preferred stock, including flotation?

Kahn Inc. has a target capital structure of 45% common equity and 55% debt to fund its $12 billion in operating assets. Furthermore, Kahn Inc. has a WACC of 14%, a before-tax cost of debt of 12%, and a tax rate of 25%. The company's retained earnings are adequate to provide the common equity portion of its capital budget. Its expected dividend next year (D₁) is $3, and the current stock price is $26.

1. What is the company's expected growth rate?

2. If the firm's net income is expected to be $1.0 billion, what portion of its net income is the firm expected to pay out as dividends? Do not round intermediate calculations. (Hint: Refer to Equation below.)

   Growth rate = (1 - Payout ratio)ROE

A.) Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 ∘C to 32.33 ∘C.

Calculate the standard enthalpy of formation (ΔH∘f) for nitroglycerin. Express the change in energy in kilojoules per mole to three significant figures.

B.) The air within a piston equipped with a cylinder absorbs 575 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.83 L against an external pressure of 1.0 atm.

What is the change in internal energy of the air within the piston?

C.) A 2.95 g lead weight, initially at 10.8 ∘C, is submerged in 8.07 g of water at 51.9 ∘C in an insulated container. What is the final temperature of both the weight and the water at thermal equilibrium? Express the temperature in Celsiu

D.) Suppose that 24 g of each of the following substances is initially at 26.0 ∘C. What is the final temperature of each substance upon absorbing 2.40 kJ of heat?

gold

silver

aluminum

water

TABLE 10-16

A realtor wants to compare the average sales-to-appraisal ratios of residential properties sold in four neighborhoods (A, B, C, and D). Four properties are randomly selected from each neighborhood and the ratios recorded for each, as shown below.
A: 1.2, 1.1, 0.9, 0.4 C: 1.0, 1.5, 1.1, 1.3
B: 2.5, 2.1, 1.9, 1.6 D: 0.8, 1.3, 1.1, 0.7

Interpret the results of the analysis summarized in the following table:



Referring to Table 10-16, what should be the decision for the Levene’s test for homogeneity of variances at a 5% level of significance?

Group of answer choices

Do not reject the null hypothesis because the p-value is larger than the level of significance.

Reject the null hypothesis because the p-value is larger than the level of significance.

Do not eject the null hypothesis because the p-value is smaller than the level of significance.

Reject the null hypothesis because the p-value is smaller than the level of significance.

Consider a T-shaped signalized intersection with the following geometric conditions and arrival vehicular flows in pcu/h as shown below. Assume the following:

▪ Left turn from the exclusive left-turn lane of northbound traffic (Lane NB1) is protected.

▪ Left turn from the shared left-turn and through lane of westbound traffic (Lane WB 1) is protected.

▪ The saturation flow rate for the exclusive left turn lane is 1785 pcu/hour. The saturation flow rates for all other lanes are 1700 pcu/hour.

▪ Amber of 3 sec. and all red of 2 sec. follow each through/right-turn green interval.

▪ Amber of 3 sec. follows the protected left-turn green interval.

▪ The pedestrian walk speed is 1.0 m/s and the pedestrian clearance time is 5 s.

Determine the designed signal timing. Present the duration of green and intergreen intervals for all phases in a tabular form

1. Consider a charge configuration in which a point charge of strength +50 nC is placed at (x, y, z) = (+2.0, 0, 0) m, and another point charge, of strength −25 nC, is placed at (x, y, z) = (−2.0, 0, 0) m.

   1. (i) Calculate an expression for the electric potential along the x-axis between the two charges.

      Hint: exercise care with how you define the value for r for each charge.

   2. (ii) Make a rough plot (by hand) of the potential along the x-axis between the two

      charges.

   3. (iii) Use your expression to calculate the electric field along the x-axis between the two charges, and confirm that the direction of the field is correctly obtained.

   4. (iv) A test charge of strength +10 nC is placed at (x, y, z) = (−1.0, 0, 0) m. It is then moved to (x,y,z) = (+1.0,0,0) m. By how much has the test charge’s electrical potential energy changed when moved?

As a financial analyst, you must evaluate a proposed project to produce printer cartridges. The purchase price of the equipment, including installation, is $65,000, and the equipment will be fully depreciated at t = 0. Annual sales would be 4,000 units at a price of $50 per cartridge, and the project’s life would be 3 years. Current assets would increase by $5,000 and payables by $3,000. At the end of 3 years, the equipment could be sold for $10,000. Variable costs would be 70% of sales revenues, fixed costs would be $30,000 per year, the marginal tax rate is 25%, and the corporate WACC is 11%.

The firm’s project CVs generally range from 1.0 to 1.5. A 3% risk premium is added to the WACC if the initial CV exceeds 1.5, and the WACC is reduced by 0.5% if the CV is 0.75 or less. Then a revised NPV is calculated.

What are the revised values for the NPV?

• NPV Best Case Scenario = $  .
• NPV Base Case Scenario = $  .
• NPV Worst-case Scenario = -$  .
• Expected NPV = $