The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.58. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.50 M B(aq) with 0.50 M HCl(aq).(a) before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 75.0 mL of HCl (e) after addition of 100.0 mL of HCl
In: Chemistry
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.53. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq).
(a) before addition of any HCl
(b) after addition of 25.0 mL of HCl
(c) after addition of 50.0 mL of HCl
(d) after addition of 75.0 mL of HCl
(e) after addition of 100.0 mL of HCl
In: Chemistry
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.38. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.70 M B(aq) with 0.70 M HCl(aq).
(a) before addition of any HCl ____
(b) after addition of 25.0 mL of HCL ____
(c) after addition of 50.0 mL of HCl ____
(d) after addition of 75.0 mL of HCl ____
(e) after addition of 100.0 mL of HCl ____
In: Chemistry
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.59. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.85 M B(aq) with 0.85 M HCl(aq).
(a) before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 75.0 mL of HCl (e) after addition of 100.0 mL of HCl
In: Chemistry
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.32. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.80 M B(aq) with 0.80 M HCl(aq).
(a) before addition of any HCl
(b) after addition of 25.0 mL of HCl
(c) after addition of 50.0 mL of HCl
(d) after addition of 75.0 mL of HCl
(e) after addition of 100.0 mL of HCl
In: Chemistry
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.37. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.55 M B(aq) with 0.55 M HCl(aq).
(a) before addition of any HCl
(b) after addition of 25.0 mL of HCl
(c) after addition of 50.0 mL of HCl
(d) after addition of 75.0 mL of HCl
(e) after addition of 100.0 mL of HCl
In: Chemistry
The pkb values for the dibasic base B are pkb1 = 2.10 and pkb2 = 7.34. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.50 M B(aq) with 0.50 M HCl (aq).
a) before addition of any HCl d) after addition of 75.0 mL of HCl
b) after addition of 25.0 mL of HCl e) after addition of 100.0 mL of HCl
c) after addition of 50.0 mL of HCl
In: Chemistry
A photon undergoes Compton scattering on a stationary electron. Before scattering, the photon's frequency is ν0, whereas after scattering said frequency is ν. After scattering, the photon's direction of movement is opposite to its original direction (scattering of 180 degrees), and the electron moves at a relativistic speed defined as 'v'.
a) the photon's wavelength before scattering was λ0=1 Angstrom. Calculate frequencies ν0 and v.
b) In this paragraph, ignore the numerical data given in paragraph a) and answer using the variables given in the main question and the physical constants 'me' and 'h' exclusively.
i) what will be the electron's direction of movement after scattering? Give a physical argumentation. Draw the problem, including the direction of movement before and after scattering.
ii) write out a relativistic formula for the conservation of Energy upon scattering.
iii) write out a formula for the conservation of Momentum upon scattering (using the same variables).
c) for the frequencies given in paragraph a), calculate the velocity of the electron, using the formula that you wrote out in paragraph b ii).
d) show that the values that you found in paragraph a) together with the velocity that you found in paragraph c) constitute a solution of the formula that you wrote out in paragraph b) iii).
THANK YOU!
In: Physics
Pranks, Inc. is a manufacturer of joke and novelty products for perpetrators of practical jokes. The corporation has paid several cash dividends throughout Year 6, the current year. It is also declaring a stock dividend to its stockholders as the calendar year-end approaches. You’ve been brought in as a consultant to assist with this process, and also to help determine whether some missing information can be determined before the distribution of the stock dividend is made. The company has two classes of stock: common stock and cumulative preferred stock.
You’ve been able to retrieve the following information so far:
| Number of common shares authorized | 800,000 |
| Number of common shares issued | 650,000 |
| Par value of common shares | $20 |
| Par value of cumulative preferred shares | $30 |
| Paid-in capital in excess of par-common stock | $7,000,000 |
| Paid-in capital in excess of par-preferred stock | $0 |
| Total retained earnings before the stock dividend is declared | $33,500,000 |
| No treasury shares have been reissued. |
|
Total Cash |
Preferred Dividends |
Common Dividends |
|||
|
Year |
Dividends |
Total |
Per Share |
Total |
Per Share |
| Year 1 | 40,000 | 40,000 | 0.20 | 0 | 0.00 |
| Year 2 | 72,000 | 72,000 | 0.36 | 0 | 0.00 |
| Year 3 | 113,000 | 68,000 | 0.34 | 45,000 | 0.09 |
| Year 4 | 135,000 | 60,000 | 0.30 | 75,000 | 0.15 |
| Year 5 | 150,000 | 60,000 | 0.30 | 90,000 | 0.18 |
| Year 6 | 210,000 | 60,000 | 0.30 | 150,000 | 0.30 |
The company declared a 3% common stock dividend on December 1, and would like you to compute the following pieces of missing information. The market value of the common shares is $25.00 on December 1, and is $30.00 on the actual distribution date of the stock, December 31.
Fill in the missing information in the following table, using the information given and your work on the other panels. All “before” items are before the stock dividend was declared. All “after” items are after the stock dividend was declared and closing entries were recorded at the end of the year.
| Total paid-in capital before the stock dividend | |
| Total retained earnings before the stock dividend | |
| Total stockholders’ equity before the stock dividend | |
| Total paid-in capital after the stock dividend | |
| Total retained earnings after the stock dividend | |
| Total stockholders’ equity after the stock dividend |
In: Accounting
Pranks, Inc. is a manufacturer of joke and novelty products for perpetrators of practical jokes. The corporation has paid several cash dividends throughout Year 6, the current year. It is also declaring a stock dividend to its stockholders as the calendar year-end approaches. You’ve been brought in as a consultant to assist with this process, and also to help determine whether some missing information can be determined before the distribution of the stock dividend is made. The company has two classes of stock: common stock and cumulative preferred stock.
You’ve been able to retrieve the following information so far:
| Number of common shares authorized | 800,000 |
| Number of common shares issued | 650,000 |
| Par value of common shares | $20 |
| Par value of cumulative preferred shares | $30 |
| Paid-in capital in excess of par-common stock | $7,000,000 |
| Paid-in capital in excess of par-preferred stock | $0 |
| Total retained earnings before the stock dividend is declared | $33,500,000 |
| Total Cash |
Preferred Dividends |
Common Dividends |
|||
|---|---|---|---|---|---|
| Year | Dividends | Total | Per Share | Total | Per Share |
| Year 1 | 20,000 | 20,000 | 0.20 | 0 | 0.00 |
| Year 2 | 36,000 | 36,000 | 0.36 | 0 | 0.00 |
| Year 3 | 88,000 | 34,000 | 0.34 | 54,000 | 0.09 |
| Year 4 | 120,000 | 30,000 | 0.30 | 90,000 | 0.15 |
| Year 5 | 138,000 | 30,000 | 0.30 | 108,000 | 0.18 |
| Year 6 | 210,000 | 30,000 | 0.30 | 180,000 | 0.30 |
The company declared a 2% common stock dividend on December 1, and would like you to compute the following pieces of missing information. The market value of the common shares is $26.00 on December 1, and is $30.00 on the actual distribution date of the stock, December 31.
Fill in the missing information in the following table, using the information given and your work on the other panels. All “before” items are before the stock dividend was declared. All “after” items are after the stock dividend was declared and closing entries were recorded at the end of the year.
| Total paid-in capital before the stock dividend | |
| Total retained earnings before the stock dividend | |
| Total stockholders’ equity before the stock dividend | |
| Total paid-in capital after the stock dividend | |
| Total retained earnings after the stock dividend | |
| Total stockholders’ equity after the stock dividend |
In: Accounting