Stoichiometry Problems for Reaction in Aqueous Solutions

-.The quantity of Cl^– in a municipal water supply is determined by titrating the sample with Ag⁺. The precipitation reaction taking place during the titration is Ag(aq) + Cl(aq) ->AgCl(s)

The end point in this type of titration is marked by a change in color of a special type of indicator. (a) How many grams of chloride ion are in a sample of the water if 20.2 mL of 0.200 M Ag⁺ is needed to react with all the chloride in the sample? (b) If the sample has a mass of 15.0 g, what percentage of Cl^– does it contain?

-.A mysterious white powder is found at a crime scene. A simple chemical analysis concludes that the powder is a mixture of sugar and morphine (C1₇H₁₉NO₃), a weak base similar to ammonia. The crime lab takes 10.00 g of the mysterious white powder, dissolves it in 100.00 mL water, and titrates it to the equivalence point with 2.84 mL of a standard 0.100 M HCl solution. What is the percentage of morphine in the white powder?

-.A sample of an iron ore is dissolved in acid, and the iron is converted to Fe²⁺. The sample is then titrated with 57.20 mL of 0.05240 M MnO₄^– solution. The oxidation-reduction reaction that occurs during titration is

MnO4(aq) + Fe^2+(aq) +8H(aq) -> Mn^2+(aq) +5Fe^3+(aq) + 4H2O(l)

How many moles of MnO₄^– were added to the solution? (b) How many moles of Fe²⁺ were in the sample? (c) How many grams of iron were in the sample? (d) If the sample had a mass of 2.8890 g, what is the percentage of iron in the sample?

-A sample of 70.5 mg of potassium phosphate is added to 25.0 mL of 0.050 M silver nitrate, resulting in the formation of a precipitate. (a) Write the molecular equation for the reaction. (b) What is the limiting reactant in the reaction? (c) Calculate the theoretical yield, in grams, of the precipitate that forms.

Exercise 13.97

The kinetics of the following second-order reaction were studied as a function of temperature:
C2H5Br(aq)+OH?(aq)?C2H5OH(l)+Br?(aq)

Calculate the number of pounds of CO2 released into the atmosphere when a 25.0-gallon tank of gasoline is burned in an automobile engine. Assume that gasoline is primarily octane, C8H18, and that the density of gasoline is 0.692 g·mL–1 (this assumption ignores additives). Also assume complete combustion.

Compare and contrast the five theories that have contributed to our understanding of human development.

PLEASE ANSWER using R studio .

VARIABLE ASSIGNMENT AND SIMPLE FUNCTIONS ##
#########################################################

#Section 2 instructions:
#Answer the following questions by defining the provided objects.

#Question 2.1 (2 points)
#Create a numeric vector that contains all integers between 1 and 1,000 (inclusive)
aS2Q1 <-

#Question 2.2 (2 points)
#Create a numeric vector that contains all even integers between 2 and 1,000 (inclusive)
aS2Q2 <-

#Question 2.3 (2 points)
#Four strings are defined as character vectors below. Using the already defined
#character vectors, create a single character vector that combines all of them
#and separates the contents of each with a comma followed by a space.
str1 <- "The National Mall in Washington"
str2 <- "D.C. has monuments"
str3 <- "museums"
str4 <- "and scenery that draws many tourists from around the world."

aS2Q3 <-

#Question 2.4 (2 points)
#Translate the following mathematical function into an R function named "zFunction": z = (x + x^2 + x^3) - (y + y^2 + y^3)
#Then, evaluate for (x, y) = (3, 4) and save your answer to the provided object.

zFunction <-

aS2Q4 <-

#Question 2.5 (2 points)
#Create a four-element list where each element is your answer to questions 2.1-2.4.
#Name the four elements ans1, ans2, ans3, and ans4
aS2Q5 <-

#Question 2.6 (2 points)
#Display the element ans3 from the list created in question 2.5 using two different methods

The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among non-smokers and 599 among smokers. The prevalence of smoking in the population is 55%. Among smokers, the etiologic fraction of disease due to smoking is:

A.

cannot be determined from the information provided.

B.

0.90 for lung cancer and 0.88 for coronary thrombosis.

C.

0.90 for lung cancer and 0.29 for coronary thrombosis.

D.

0.89 for lung cancer and 0.88 for coronary thrombosis.

E.

0.89 for lung cancer and 0.29 for coronary thrombosis.

The assignment will be graded both running and reading your code.

Readability: Your code should be readable. Add comments wherever is necessary.
If needed, write helper functions to break the code into small, readable chunks.

Write two concrete classes implementing GeometricShape

The class Circle. Circle will have the following public methods:

// a constructor
Circle(Point center, int radius);

// returns the area of the circle
float getArea();

// returns the perimeter of the circle
float getPerimeter();

// prints the center of the circle and its radius
virtual void print();

The class Rectangle. Rectangle will have the following public methods:

// a constructor
Rectangle(Point topLeftPoint, int length, int width);

// returns the area of the rectangle
float getArea();

// returns the perimeter of the circle
float getPerimeter();

// prints the top left point of the rectangle, its length and width
virtual void print();

Write a function test() that tests your solutions.

Financial Analysis questions:

Industry: Automotive

1. If the inventory turnover ratio, net income to employees, and revenue to employees ratio are below the industry average what does it tell? is it bad or good?

2. If the asset turnover ratio and receivable turnover ratio are above the industry average is it good or bad and what does it tell?

3. If your ROA, ROE, ROI, Gross Margin, operating margin, net profit margin, and EBITDA margin are above/below the industry average, what does it tell? Good or bad?

4. what are some growth analysis ratios? And if they above/below the industry average, what does it tell? Good or bad?

Microeconomics Assignment 1 Dua

1. In Japan each unit of labor can produce 2 computers or 4 cell phones. In Canada each unit of labor can produce 3 computers or 5 cellphones.

a) Which country has absolute advantage of trade in producing cell phones?

b) Which country has absolute advantage of trade in producing computers?

c) Which country has a comparative advantage in producing computers?

d) Which country has comparative advantage in producing cell phones?

2. Label each of the following statements as a positive or a normative statement.

a) The minimum wage ought to be abolished.

b) A little bit of inflation is worse for society than a little bit of unemployment.

c) Society should take measures to prevent people from engaging in dangerous personal behavior.

d) The inflation rate has been rising for the last two years.

e) The government should not be running a budget deficit.

f) Per capita income in the United States has gone down in 2017.

Answer the following questions for the linear programming problem given below:

1. Write the Phase-One LP model
2. Conduct one iteration of the Simplex method.
3. Describe how the optimal solution to the original problem will be determined from this point on.

maxz=2x1+3x2+x3maxz=2x1+3x2+x3

Subject to:Subject to:

x1+x2+x3≤40x1+x2+x3≤40

2x1+x2−x3≥102x1+x2−x3≥10

−x1+x3≥10−x1+x3≥10

x1,x2,x3≥0

Listen to the interview with Richard Rothstein on the National Public Radio Fresh Air segment. Then answer the following questions regarding the content of the interview.

1. What are some ways that government policies instituted in the early to middle 20th century impacted the demographics of housing?

2. Discuss ways that these policies may play a role in susceptibility to disease to COVID-19 infection?

Find the duration of a 8.4% coupon bond making semiannually coupon payments if it has three years until maturity and has a yield to maturity of 6.0%. What is the duration if the yield to maturity is 11.0%? Note: The face value of the bond is $100. (Do not round intermediate calculations. Round your answers to 4 decimal places.)

1. A naturally occuring element consists of two isotopes. Calculate the percent abundances for the two isotopes, if it's average atomic mass is 107.87. Isotope 1: 106.91amu; Isotope 2: 108.90amu

2. Write the balanced chemical equation for the following unbalanced chemical reaction: C3H8 + O2 ---> CO2 + H2O. How do I figure this out?

3. Acceleration die to gravity of a free-falling object is 9.8 m/s2. Express this in mm/ms2. Answer is 9.8 x 10^-3, but not sure how to get that.

4. Specific gravity of concentrated sulfuric at 25 °C is 1.84. If density of water at 25 °C is 0.995g/mL, what is the density of concentrated sulfuric acid at the same temperature? I thought the answer was 1.85g/mL but that is incorrect. The correct answer is 1.83g/mL but I'm not sure how to get this answer.

Organizational Behaviour

Mini Assignment (Individual)

Total course marks: 5%

Instructions:

Not more than 1.5 Total pages as your answer. Font size 11 Arial

You must use concepts from the text to demonstrate your learnings.

Question for the assignment:

With many companies encouraging “work at home” (virtual work) during the coronavirus pandemic:

1. How will virtual work impact team dynamics?

2. How might it impact conflict management?

3. How might it impact communication?

Fiscal and Monetary Policy

So now, since you've learned a bit about policy, and the difficulties associated with its implementation, your task for this discussion is perhaps the most challenging one.

In your initial post, you are to write to either the President (on fiscal policy) or to the Chair of the Federal Reserve (on monetary policy) describing a specific policy action that you believe should be taken at this moment in time (e.g., lower taxes or buy bonds) and explain why you would take the action (what is currently happening in the economy and what will this action accomplish?). Your thoughtful post (of between 200 - 400words)You can learn about the current state of our economy by consulting newspapers or news websites..