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2 (g) + H2O (l) + 2KCl (aq)
Group of answer choices
2H+ (aq) + 2OH- (aq) → 2H2O (l)
NR (no reaction)
2K+ (aq) + SO32- (aq) + 2H+ (aq) + 2Cl- (aq) → SO2 (g) + H2O (l) + 2KCl (s)
SO32- (aq) + 2H+ (aq) → SO2 (g) + H2O (l)
2K+ (aq) + SO32- (aq) + 2H+ (aq) + 2Cl- (aq) → SO2 (g) + H2O (l) + 2K+ (aq) + 2Cl- (aq)

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titrated with a 0.200 M solution of the base, LiOH.
Write the balanced chemical reaction for neutralization reaction:
HClO4 (aq) + LiOH (aq) → LiClO4 (aq) + H2O (l)
Write the NET ionic equation for the neutralization reaction.
OH⁻ (aq) + H⁺ (aq) → H2O (l)
Compute the pH of the titration solution. Show your work
i) before any of the base is added
ii) after 25. mL of base is added
iii) after 50. mL of base is added
A student performs the titration with the same chemicals but with smaller volumes of each chemical . Which of the following titration curves could represent the titration. Explain
A because this entails a strong acid and a strong base.
Question 2
A student performs a titration of an unknown acid with a strong base and gets the following titration curve:
a) The student consults the list of pKa of acids shown below. If the acid is listed in the table below, which is the most likely identity of the unknown acid? Explain.
Acid
Ka
HF
7.2 x 10-4
CH3COOH
1.8 x 10-5
H2CO3
4.3 x 10-7
HBrO
2.0 x 10-9
The unknown acid is HBrO because the calculated Ka is in between 50^-4 and 50^-6 and 2.0 x 10^-9 lies in between them.
b) What is the initial molarity of the acid?
10^-3 = 0.001M
Question 3
a) Describe the components and the composition of an effective buffer solution. Explain how the components of the buffer allow the buffer to maintain its pH.
An effective buffer solution has a weak acid and its conjugate base or a weak base and its conjugate acid. A buffer solution is most effective when the ratio of its component concentrations is close to 1, also when the pH is equal to the pka of the acid.; The components of the buffer allow the buffer to maintain its pH because buffers can absorb excess H+ions or OH– ions.
An employer is interviewing four applicants for a job as a laboratory technician and asks each how to prepare a buffer solution with a pH of 5.0. The following constants may be helpful: hydrazoic acid, pKa = 4.74 Boric acid, pKa = 9.23
Archita A. says she would mix equal molar solutions of hydrazoic (HN3) and sodium azide (NaN3) solutions.
Bradley B. says she would mix equimolar Boric acid (H3BO3) and HCl solutions.
Carlos C. says he would mix equimolar Boric Acid (H3BO3) and sodium dihydrogen borate (NaH2BO3) solutions.
Delia D. says he would mix equimolar hydrazoic Acid (HN3) and NaOH solutions.
b) Which of these applicants has given an appropriate procedure? Explain your answer
Delia because she is using Sodium hydroxide which results in a pH of 5. NaOH is a strong base and in order to have an effective buffer a weak acid must be incorporated which is the HN3.
c) Explain what is wrong with the erroneous procedures.
The rest all incorporate a strong acid and a strong base or a weak acid and a weak base which don’ result in an effective buffer.
d) The applicants have access to the 1 Liter volumes of each of the solutions listed above. They have access to graduated cylinders. In order to make 1.0 Liter of the correct 5.0 buffer solution, what volumes of the two chemicals must be mixed?

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3.A long, straight wire carries a current of 10 A to the right. Just 0.2 m below the wire lies ...

oop carrying a current of 2 A as shown. The wire loop forms a square with sides of length1.0 m. What is the direction of the net force on the square loop due to the long, straight wire?

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d lead (II) sulfate precipitates
(a) Write a balanced chemical equation for the reaction
(b) Write the net ionic equation for the reaction
(c) What type of reaction is occurring?
(d) What is the limiting reagent? The excess reagent?
(e) How many grams of lead (II) sulfate are formed?
(f) In the lab, a chemistry student mixed the two solutions together and formed 9.40 g of lead (II) sulfate. What percent yield did the student obtain?

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motionless puck as shown on the picture above. The net force that the stick applies on the puck is 150N and the contact lasts for 7.5 ms. The mass of the puck is 166 g.
A) (1 point) Calculate the acceleration of the puck under the influence of the net force.
B) (2 points) Calculate the puck's change in momentum due to the impulse applied by the hockey stick.
C) (1 point) What is the velocity of the puck once it leaves the stick?
Puck travels over rough ice and comes to a stop after 25 m. The force diagram below shows all forces acting on the puck during that travel.
Screen Shot 2020-11-02 at 2.04.05 PM.png
D) (1 point) Calculate the work done on the puck by gravitational force.
E) (1 point) Calculate the work done on the puck by normal force.
F) (2 points) Calculate work done by friction force on the puck.
CNX_UPhysics_09_03_HockeyPuck.jpg
Now stationary, the puck (red) collides with a blue puck of the mass .332 kg moving to the left with velocity of 2.5 m/s. If collision is perfectly elastic calculate:
H) (2 points) Total momentum of blue+red puck system before collision?
I) (1 point) What is the total momentum of blue+red puck system after collision? How do you know?
J) (2 points) What is the velocity of the blue puck after collision?

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estion. Assuming a projected increase in sales of 12% annually, a gross profit margin this year of 19.23%, an operating profit margin this year of 16.31% and a called dividend each year of 16% of after tax earnings, 23.U0 P Flag question Finish attem Time left 2:2 (1) complete the income statement below; (3 points) (2) prepare two subsequent years of pro formas; (6 points) (3) what is the gross profit margin for year 2? (1 point) (4) what is the operating profit margin for year 2? (1 points) (5) what is the gross profit margin for year 3? (1 point) (6) what is the operating profit margin for year 3? (1 point) (7) what is the compound annual growth rate of dividends from year 1 to year 3? (3 points) (8) What is the growth rate of the company's after tax earnings from year 1 to 3? (3 points) (9) If the company too 45% of this year's net profits after taxes and invested in a new line of business with anticipated cash flows of $60,000, $65,000, $75,000 and $90,000 over the next four years, assuming a 10% discount rate, what is the projects NPV? (3 points) (10) Would you recommend the project considered in question 9 above? Why or why not? (1 point) Income Statement of Company A Sales Revenue $4,396,223 Less COGS Fixed Costs Variable costs (42%) Gross Profits Less Operating Expenses Fixed Expenses Variable Expenses (2.8%) Operating Profits Less Interest Expense (2.7%) Net Profits before Taxes Less Taxes (21%) Net profits after taxes Less Dividend Increased Retained Earnings

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e a look at this spreadsheet so I can properly explain:
https://docs.google.com/spreadsheets/d/1lEJIPiSZJk9LYUTSA4oeDwyLXCVd18Zdewm6gnjxcXo/edit?usp=sharing
Ok, so for the sake of simplicity We'll just go with row two here. Cell A2 represents the hours worked freelancing, where B2 is for the minutes of the recorded time frame. C2 is the net amount earned in that time. Over in cell N10 I need to figure out an equation using the =SUM() function (treats it as a normal math problem) where it prints the hourly income based on those three integers. I'll admit i was never great at math, but in my defense I've been up since 6 am yesterday (currently 3 pm) and have been running solely on caffiene and nicotine haha... The sheet is editable and I can see any changes you make in realtime. Is there any way you could help me out on this one? It's for a work report type thing.

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9.I have a math project. The problem is calculating net income. It says 50,000 a year, I can do the ...

come but it says 4.25 tax rate for Michigan, how do I implement that in there? Like what do I do with that rate

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er, $4.60 for each microwave oven, and $1.55 for each food blender he assembles. If he produced 54 toasters, 38 microwave ovens, and 75 blenders, what were his total weekly gross earnings (in $)?
Jerry King is a server in a restaurant that pays a salary of $24 per day. He also averages tips of 18% of his total gross food orders. Last week he worked 6 days and had total food orders of $2,963.50. What was his total gross pay for the week (in $)?
Solve the problem using 6.2%, up to $128,400 for Social Security tax and using 1.45%, no wage limit, for Medicare tax.
Calculate the monthly Social Security and Medicare withholdings (in $) for the employee as the payroll manager for a cargo and freight company. (Round your answers to the nearest cent.)
Lee Sutherlin is a self-employed electrical consultant. He estimates his annual net earnings at $35,600. How much Social Security and Medicare must he pay (in $) this year?

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sale are 5/10, n/30. If the
retailer sends a partial payment $8,700 on the discount date.
a. How much credit is taken off the bill due to the partial payment?
b. What is the net amount still due?
5. Jen’s Pottery Shop orders china from a supplier for $240 including $30 freight charges. The terms of sale are 3/10, n/30
ROG. The china arrives on 11/21 and Jen wants to take advantage of the cash discount.
a. As bookkeeper for Jen’s, how much will you send the supplier?
6. A small business receives an invoice for merchandise on August 5. The terms of sale are 2/20, n/30. If the manager elects to take the cash discount, what is the discount date?
7. Price Company received an invoice in the amount of $3,800 dated May 24 for merchandise they purchased. The terms of sale
are 3/15, 2/30, n/45. The Company plans to pay the invoice on June 20th?
a. What is the percentage the company will save by sending it on this date?
8. Luggage World buys briefcases with an invoice date of April 28. The terms of sale are 2/10 EOM. What is the discount date?
9. Chuck’s Chops, an upscale steak house, received an invoice for 800 pounds of baking potatoes with a cost of $.85 per pound.
The terms are 2 ½ /10, n/30. Chuck was unable to pay the bill in full within the discount period but was able to remit a partial
payment of $575.00 within the discount period. How much credit did Chuck receive for his partial payment?
10. A toy store buys stuffed animals with a list price of $17,000. If the wholesaler offers trade discounts of 32/27/15,
a. Find the trade discount amount of the stuffed animals?
11. The invoice on an invoice was February 11th with terms of sale 2/10, 60 Extra.
a. What is the discount date?
b. What is the net date?
12. Stan ordered merchandise on October 26th, the terms of sale for his item was 2/10, ROG. If his item was received on
November 27th?
a. What is the discount date?
b. What is the net date?
13. Josie ordered an item on June 27th with terms of sale 3/15, EOM.
a. What is the discount date?

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is a multiple of three or greater than eight.
A certain game consist of rolling a single fair die and pays off as follows nine dollars for a six, six dollars for a five, one dollar for four and no payoffs otherwise.Find the expected winnings for this game.
A fair die is rolled four times. A 6 is considered success While all other outcomes are failures find the probability of three successes.
A pet store has nine puppies including 4 poodles 3 terriers and 2 retrievers. If Rebecca an errand in that order each select one puppy at random without replacement find the probability that Aaron select a retriever given that from last Rebecca selects a poodle.
Experience shows that a ski lodge will be for (166 guests) if there is a heavy snowfall in December, well only partially full (52 guests) With a light snowfall. What is the expected number of guests if the probability for a heavy snowfall is 0.40? I assume that heavy snowfall and light snowfall are the only two possibilities.
A pet store has six puppies Including two poodles two Terriers and to retrievers. If Rebecca and Aaron in that order each select one puppy random with replacement (They both may select the same one) Find the probability That Rebecca selects a terrier and Aaron selects a retriever.
Three married couples arrange themselves randomly in six consecutive seats in a row. Determine (A) the number of ways the following event can occur, And (B) the probability of the event. (The denominator of the probability fraction will be 6!=720, The total number of ways to arrange six items ). Each man was that immediately to the right of his wife.
A coin is tossed five times. Find the probability that all our heads. Find the probability that at least three are heads.
A certain prescription drug is known to produce undesirable facts and 35% of all patients due to drug. Among a random sample of a patient using a drug find the probability of the stated event. Exactly 5 have undesired effects.
10,000 raffle tickets are sold. One first prize of 1600, for second prizes of 800 each, And 9/3 prizes of 300 each or to be awarded with all winners selected randomly. If you purchase one ticket what are your expected winnings.
Suppose a charitable organization decides to Raise money by raffling A trip worth 500. If 3000 tickets are sold at one dollar each find the expected net winnings for a person who buys one ticket. Round to the nearest cent
Three men and seven women are waiting to be interviewed for jobs. If they are selected in random order find the probability that all men will be interviewed first
A fair diet is rolled. What is the probability of rolling on our number or a number less than three.
The pet store has 15 puppies, including five poodles, five Terriers, and five retrievers. If Rebecca and Aaron, in that order, select one puppy at random without replacement, find the probability that both select a poodle
Beth is taking a nine question multiple-choice test for which each question Has three answer choices, only one of which is correct. Beth decides on answering By rolling a fair die And making the first answer choice if the die shows one or two, The second If the die shows three or four, and the third if the die shows five or six. Find the probability of the stated event. Exactly 6 correct answers
For the experiment of drawing a single card from a standard 52 card deck find (a) the probability and (b) the odds are in favor that they do not drive six

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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics