opn04125

In the infrared spectrum of HBr there is an intense line at 2630 cm-1. Calculate the force constant and period of vibration of HBr.

The far infrared spectrum of ³⁹K³⁵Cl has an intense line at 278.0 cm^-1. Calculatethe force constant and the period of vibration of ³⁹K³⁵Cl in the harmonic oscillator / rigidrotor approximation.

35Cl2 (560 cm-1), 39K35Cl (281 cm-1), 1H2 (4401 cm-1). Calculate the force constants for these molecules if treated as harmonic oscillators. 

Write a letter as if you are a foreign exchange student living in America. Pretend you are writing to your family in your homeland and you must explain an American custom they know nothing at all about.

To write a convincing letter, you must examine the American custom through the eyes of an outsider. What may seem perfectly natural and logical to us may seem silly to someone from a foreign country.

Think about what foreign students must think when they are first confronted with American children dressing in rags and outlandish costumes, going out knocking on doors begging for candy, and threatening to pull a trick on the people who have no candy for them. Or what about American customs at Christmas and Thanksgiving?

Your letter must be a minimum of three paragraphs containing 5-7 sentences each.

5. America is experiencing immigration problems. Conduct an internet search on immigration in America today. List some of the problems that face America due to immigration problems and explain how you think some of these problems could be solved. paraphrase your answers. Don't forget to cite any resources you use in your answer.

A box contains 5 white and 4 black balls. Two balls are picked together at random from the box.

What is the probability that these two balls are of different colours ?

1.          1/2
2.          5/18
3.          5/9
4.          1/3

Newport Corp. is considering the purchase of a new piece ofequipment. The cost savings from the equipment would result in anannual increase in cash flow of $200,000. The equipment will havean initial cost of $825,000 and have a 6 year life. There is nosalvage value for the equipment. If the hurdle rate is 11%, what isthe approximate net present value? Ignore income taxes.(Future Value of $1, Present Value of $1, Future ValueAnnuity of $1, Present Value Annuity of $1.) (Useappropriate factor from the PV tables. Round your final answer tothe nearest dollar amount.)

$846,100

$275,000

$21,100

$825,000

You are saving for a car that you plan to purchase in fiveyears. You plan to put $3,800 in savings (which earns 11%,compounded annually) at the end of each year until then. How muchwill you have saved for the car at the end of the five years?(Future Value of $1, Present Value of $1, Future ValueAnnuity of $1, Present Value Annuity of $1.) (Useappropriate factor from the PV tables. Round your final answer tothe nearest dollar amount.)

a. $22,266

b. $19,000

c. $23,666

d. $28,106

You are saving for a car and have decided you can afford todeposit $5,000 into a savings account at the end of each of thenext five years, at which point you will withdraw the money topurchase the car. You can deposit the money in a savings accountthat earns 8% interest with no annual fee, or you can choose asavings account that earns 10% interest, but has an annual fee of$100.00 that would come out of your deposits. (Future Valueof $1, Present Value of $1, Future Value Annuity of $1, PresentValue Annuity of $1.) (Use appropriate factor fromthe PV tables.)


a. If you choose the free savings account, howmuch money will you be able to withdraw five years from now?(Round your final answer to the nearest dollaramount.)



b. If you choose the savings account with a fee,how much money will you be able to withdraw five years from now?(Round your final answer to the nearest dollaramount.)



c. Which option would be best for youfinancially?

How much would you need to deposit now in a savings account that earns 5% interest, compounded annually, in order to withdraw $5,000 at the end of every year for ten years

How much will you have in a savings account in ten years, if you deposit $1000 in the account at the end of each year and the account earns 6% interest, compounded annually? how would i work this out

As a part of your savings plan at work, you have been depositing $250 per quarter in a savings account earning 8% interest compounded quarterly for the last 10 years. You will retire in 15 years and want to increase your contribution each year from $1,000 to $2,000 per year, by increasing your contribution every four months from $250 to $500. Additionally, you have just inherited $10,000, which you plan to invest now to earn interest at 12% compounded annually for the next 15 years. How much money will you have in savings when you retire 15 years from now?

For the voltaic cell shown, calculate theE^o .

Pt(s) l OH^-(aq) l O₂(g) llOH^-(aq), H₂O(l) l H₂(g),Pt(s)

Pt(s) l OH^-(aq) l O₂(g) ll OH^-(aq), H₂O(l) l H₂(g), Pt(s)

Number 5 need asap

What is i⁷³?

Select one:

a. 1

b. -1

c. i

d. -i

e. None of these

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The x-intercept of y = 4x – 8 is?

Select one:

a. (0, -8)

b. (4, -8)

c. (0, 0)

d. (2, 0)

Question 3

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According the rational root theorem, how many possible rational roots are there to 2x⁴ + 14x³ – 6x + 7 = 0?

Select one:

a. 2

b. 4

c. 6

d. 8

e. None

Question 4

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If f(x) = 3x – 5, what is the inverse of f?

Select one:

a. -3x + 5

b. 5x – 3

c. x/3 + 5/3

d. x/3 – 5/3

e. None of these

Question 5

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If f(x) = x², what is f(x + h) – f(x)?

Select one:

a. h

b. 2xh + h²

c. 2xh

d. 2x + h

Question 6

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Solve for x: e^{2x + 1} = 10. Choose the closest answer.

Select one:

a. 0.1

b. 0.3

c. 0.6

d. 0.9

e. None of these

Question 7

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If A = 3 and B = 4 + i, A/B = ?

Select one:

a. 3/4

b. 12/17 – (3/17)i

c. 12/5 + (3/5)i

d. 12/17 + (3/17)i

Question 8

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The graph of f(x) = x³ -6x² + 4x +1 hits the x-axis how many times?

Select one:

a. 0

b. 1

c. 2

d. 3

Question 9

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The solutions of x² -8x + 17 = 0 are?

Select one:

a. 4 + i and 4 – i

b. -8 and 17

c. 4 and -4

d. √17 and -√17

e. No solutions

Question 10

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As x goes to infinity, the graph of f(x) = 5x⁴ - 173x³ -16x² -7x -15 goes to (points in) what direction?

Select one:

a. ∞

b. -∞

c. 0

d. 1

e. 5

Question 6

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Solve the system: 2x + y = 6, -2x + 3y = 5

Select one:

a. (2, 2)

b. (11/4, ½)

c. (13/8, 11/4)

d. No solution

e. None of these

Question 7

Question text

Solve the system (domain is all real numbers): y = x² + 5, y = x - 4

Select one:

a. (0, 5)

b. (0, -4)

c. (1, 6) and (1, -3)

d. No solution

e. None of these

Question 8

Question text

Solve the system: x + y + z = 3, 2x – y + 3z = 3, x - 2y + 3z = 0

Select one:

a. (1, 1, 1)

b. (1, 2, 0)

c. (2, 1, 0)

d. No solution

e. None of these

Question 9

Question text

Solve the system: y = x² + 7, y = 4x + 3

Select one:

a. (0, 7)

b. (0, 7) and (0, 3)

c. (2, 11)

d. No solution

e. None of these

Question 10

Question text

Solve the system: y = x² + 4x – 5, y = 0

Select one:

a. (0, -5) and (1, 1)

b. (4, 4) and (-5, -5)

c. (1, 0) and (-5, 0)

d. No solution

e. None of these

(3) (a) You want to purchase a new car. You are offered a loan for $16,000 with an annual interest rate of 6% and a 36-month repayment period. Use the average balance method to estimate the total amount you will pay over the 36 months for this $16,000 car loan? Round to the nearest dollar.

Alicia is purchasing groceries. She bought tomatoes: for $2.54, apples for $3.53 and pretzels for $2.49. Which item was the most expensive? Which items was the least expensive?

Please help. Please show all work. Do not use shortcut b/2^2 (not allowed for assignment) thanks!

Which of the following responses depicts the correct order in which blood is circulated through the body?

A 25.0 mL sample of 0.100 M pyridine (Kb = 1.7 X 10^-9) is titratedwith 0.100 M hydrochloric acid. Calculate the pH after the additionof the following amounts of hydrochloric acid.

a)0.0 mL
b)4.0 mL
c)8.0 mL
d)12.5 mL
e)20.0 mL
f)24.0 mL
g)24.5 mL
h)25.0 mL
i)26.0 mL
j)28.0 mL
k)30.0 mL

61. Lactic acid is a common by-product of cellular respiration and
is often said to cause the “burn” associated with strenuous activity.
A 25.0-mL sample of 0.100 M lactic acid (HC3H5O3,
pKa 5 3.86) is titrated with 0.100 M NaOH solution. Calculate
the pH after the addition of 0.0 mL, 4.0 mL, 8.0 mL, 12.5 mL,
20.0 mL, 24.0 mL, 24.5 mL, 24.9 mL, 25.0 mL, 25.1 mL,
26.0 mL, 28.0 mL, and 30.0 mL of the NaOH. Plot the results
of your calculations as pH versus milliliters of NaOH added.

Place in order the following countries in terms of what you would think would be the least to most corrupt:

United States, Denmark, Saudi Arabia, Russia, Australia, Hong Kong, Canada, China, Botswana, Thailand, France, Chile.
Use an Internet search engine to find the most recent International Corruptions Perceptions Index (CPI) released by the Berlin-based organization Transparency International.

Check your predictions with the Index.

How well did you do? What countries surprised you? Why?

Titration Problem:

Lactic acid, HC₃H₅O₃ (see right for structure), builds up in muscles after vigorous exercise. It is a weak acid with a pK_a = 3.86.

Consider the following titration:

25.0 mL 0.500 M lactic acid is titrated with 1.00 M NaOH.

Answer the following questions:

1. What is the pH of the lactic acid solution before any NaOH is added?

2. What is the pH after 5.00 mL of 1.00 M NaOH is added?

3. What is the pH at the equivalence point?

4. What is the pH when 25.0 mL of 1.00 M NaOH has been added?

Write a summary about the activity of jogging and how we benefit from jogging.

Suppose that you first titrated 25.0 mL of 0.500 M HCL with 0.500M NaOH and then 25.0 mL of 0.500 M of a weark acid HA with 0.500M NaOH.How would the titration curves compare at 10 or 15 ml of NaOH beyond the equivalence points? Explain.

Calculate the vapor pressure for water when adding 10g of glucose to 1L of water at 20 degrees celcius. (The vapor pressure of water at this temperature is 17.5 torr)

In a closed vessel at 800 degree celcius and 0.995 atm some CO2 has been preserved. After adding some C, some CO2 transformed into CO and temperature remain constant,pressure is 1.225 atm.calculate kp..

Calculate the number of moles of solute present in 500 mL of a 0.75 M solution of magnesium chloride (MgCl2).

What is an unknown compound?

Which of the following is a feature of a unitary system of government?

A.Each region can decide what's best for itself with minor national oversight.

B.Each region generally abides by the same laws.

Explain how evidence-based research can eliminate or minimize ethical concerns in the health care industry.