50mL of a 0.1000 M aqueous solution of hydrazoic acid (HN3, pKa=4.72) is titrated with a 0.1000M solution of sodium Hydroxide. Calculate the pH at the following points a. Before Titration b. After the addition of 5.00mL of NaOH c. After the addition of 25.00mL of NaOH d. After the addition of 50.00mL of NaOH e. After the addition of 51.00mL of NaOH. PLEASE EXPLAIN STEPS AND NOT JUST SHOW WORK, I KNOW THE FIRST ONE, THE OTHERS ARE GIVING ME TROUBLE

50mL of a 0.1000 M aqueous solution of hydrazoic acid (HN3, pKa=4.72) is titrated with a 0.1000M solution of sodium Hydroxide. Calculate the pH at the following points a. Before Titration b. After the addition of 5.00mL of NaOH c. After the addition of 25.00mL of NaOH d. After the addition of 50.00mL of NaOH e. After the addition of 51.00mL of NaOH. PLEASE EXPLAIN STEPS AND NOT JUST SHOW WORK, I KNOW THE FIRST ONE, THE OTHERS ARE GIVING ME TROUBLE

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.240 M HClO(aq) with 0.240 M KOH(aq).

The ionization constant for HClO can be found here.

https://sites.google.com/site/chempendix/ionization

(a) before addition of any KOH

(b) after addition of 25.0 mL of KOH

(c) after addition of 30.0 mL of KOH

(d) after addition of 50.0 mL of KOH

(e) after addition of 60.0 mL of KOH

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.110 M HClO(aq) with 0.110 M KOH(aq). The ionization constant for HClO (4.0x10^-8) I need answers for each one. Thanks!

(a) before addition of any KOH

(b) after addition of 25.0 mL of KOH

(c) after addition of 35.0 mL of KOH (

d) after addition of 50.0 mL of KOH

(e) after addition of 60.0 mL of KOH

The following information for 2020 for Vinnie`s Cream Pie Fillings is available: Baking capacity 3,000 tonnes of filling Tonnage sold in year 1,800 Sales $900,000 Variable costs 495,000 Contribution margin $405,000 Fixed costs Manufacturing 90,000 Selling 112,500 Administration 45,000 Income before taxes $157,500 Income taxes @ 40% 63,000 Net income $ 94,500 Instructions Consider each of the following scenarios independently: a) Calculate the break-even volume in tonnes for the year. b) If Vinnie expects to sell 2,100 tonnes of filling next year, calculate the expected aftertax income, assuming costs and prices remain the same. c) Vinnie`s cousin says he can sell pie filling to a new company in a nearby city but will require Vinnie to pay $61,500 to advertise the product. In addition, Vinnie will have to pay his cousin $25 for each tonne sold. Calculate the number of tones that will have to be sold to maintain the current after-tax net income. d) Vinnie wants to ramp up production by investing in a new machine that will cost $58,500. The benefit will be that variable costs will decrease by $25 per tonne. Calculate the new break even if the new machine is purchased. e) Assume instead that Vinnie does not purchase the machine or begin selling in the new city. He is worried that per-tonne selling prices will decline by 10% and variable costs will increase by $40 per tonne. Calculate the sales volume in dollars needed if Vinnie is to maintain his after-tax income of $94,500.

Tai Chi is often recommended as a way to improve balance and flexibility in the elderly. Below are

before-and-after flexibility ratings (on a 1 to 10 scale, 10 being most flexible) for a random sample of 8 men in their 80's who took Tai Chi lessons for six months.

Subject A B C D E F G H

Flexibility rating after Tai Chi 2 4 3 3 3 4 5 10

Flexibility rating before Tai Chi 1 2 1 2 1 4 2 10

(a) Explain why these are paired data.

(b) Calculate and interpret the mean difference.

(c) Researchers would like to know if the true mean difference (after-before) in flexibility rating for men in their 80's who take Tai Chi lessons for 6 months is greater than zero. The P-value of this test is 0.004. Interpret this value.

(d) If the result of this study is statistically significant, can you conclude that the difference in the mean flexibility rating was caused by the Tai Chi lessons? Why or why not?

FAKE PLC is a television programme broadcaster and producer. The firm is currently all equity funded. FAKE has 10 million shares outstanding, with a price of £40 per share. FAKE plans to raise £160 million to fund its programme expansion by issuing new shares.

Before the issue of new shares, FAKE's equity Beta was 0.8, the riskfree interest rate was 2% and the market's expected return on equity was 6%.

Assume there are perfect markets, with no taxes.

1. How many new shares must FAKE issue, to raise £160 million?  
2. After issue of new shares, FAKE's equity Beta rises to 1.0. The risk-free interest rate and market's expected return are the same. Use CAPM to calculate the pre- and post-expansion return on equity for FAKE PLC.
3. Suppose that FAKE raises £160m by issuing debt instead of equity, and that the cost of debt for FAKE is 3.2%. What is FAKE’s return on equity before and after the debt issue?
4. What is FAKE’s WACC before and after the debt issue? Illustrate your answer with a diagram.

A researcher was interested in the effects of alcohol on attractiveness of mate selected (referred to as the beer goggle effect). She compared the rating (by independent raters) on level of attractiveness of the partners that young people chose at a party. She compared a group before using alcohol then after using alcohol. Assessment was whether their chosen partners differed in levels of attractiveness. Higher scores indicated more attractive partners. The attractiveness of partner for each participant (measured by independent raters) in 2 scenarios for the same group (before using alcohol and after using alcohol) was as follows:

1. Test the hypothesis (Use alpha level of 0.05) using both manual and MS Excel calculations that there is no statistically significant difference between alcohol using and non-alcohol using group with regard to the level of attractiveness of the partners they chose by the end of the party. In your answer determine and interpret the strength of this relationship.

Topic 2:

Book: Operations and Supply Chain Management Jacobs & Chase 14e

2. The Levy Box plant produces wooden packing boxes to be used in the local seafood industry. Current operations allow the company to make 600 boxes per day, in two 8-hour shifts (300 boxes per shift). The company has introduced some moderate changes in equipment, and conducted appropriate job training, so that production levels have risen to 400 boxes per shift. Labor costs average $13 per hour for each of the 5 full-time workers on each shift. Capital costs were previously $4,000 per day, and rose to $4,200 per day with the equipment modifications. Energy costs were unchanged by the modifications, at $400 per day.

a) What is the firm's multifactor productivity ( exhibit 2.5) before and after the changes?

b) What is the firm's labor hours productivity before and after the changes?

c) What is the percent change in the multifactor productivity before and after the changes?

Sheffield Inc., a greeting card company, had the following statements prepared as of December 31, 2020.

Additional information:

Prepare a statement of cash flows using the indirect method. (Show amounts that decrease cash flow with either a - sign e.g. -15,000 or in parenthesis e.g. (15,000).)