Analytical Chemistry - Determination of Fe in Vitamin tablet:

Iron was reduced by 25 mL 6M HCl and DI water.

Unknown Iron Sample: 10 mL diluted with DI water in 100 mL volumetric flask,

Iron Standards: 30 mL of 0.7385 mM

2 mL of hydroquinone solution, 3 mL o-phenanthroline solution and 10 mL of pH 3.5 buffer added to all flasks.

All flasks were diluted to the 100 mL mark. Spectroscopy was used to measure the absorbance at 510 nm and values of wavelength and absorbance for 6 runs are known.

Please explain in detail how to plot a Beer-lambert law from my wavelength and absorbance data in excel. How to plot the absorbance vs. iron concentration added in the standards (in μg) and calculate the μg of iron in the standards and determine the unknown concentration from the curve?

USE Python 3, please type thanks!

Write a Python 3 program to calculate the Body Mass Index (BMI) of a person if they enter their weight and their height to your program. Check out the formula here:

http://www.freebmicalculator.net/calculate-bmi.php

Your program should first print "Body Mass Index Calculator"

The program will then ask the user if they want to enter Metric Units or English Units.

Using the appropriate formula (see link above) calculate their BMI.

Depending on their BMI show their body type (Underweight, Normal Weight, Overweight or Obese).

For BMI ranges see the following link:

http://www.freebmicalculator.net/healthy-bmi.php

HINT: to find the appropriate body type you might want to study this program:

score = input("Enter score: ")
score = int(score)
if score >= 80:
    grade = 'A'
elif score >= 70:
    grade = 'B'
elif score >= 55:
    grade = 'C'
elif score >= 50:
    grade = 'Pass'
else:
    grade = 'Fail'
print ("\n\nGrade is: " + grade)

Include in the comments a set of test runs to show that your program is correct.

Double check your results by testing using the same values in your program as in the following online BMI calculator:

http://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm

Thank you for your help!!

Here is a picture of a Binary Search Tree.



First, construct the Binary Search Tree using the following BinaryNode as we discussed in class.

public class BinaryNode {
        private int value;
        private BinaryNode leftChild;
        private BinaryNode rightChild;

        public BinaryNode(int value) {
                this.value = value;
                leftChild = null;
                rightChild = null;
        }

        public BinaryNode(int value, BinaryNode leftChild, BinaryNode rightChild)
        {
                this.value = value;
                this.leftChild = leftChild;
                this.rightChild = rightChild;
        }

        public int getValue() {
                return value;
        }

        public void setValue(int value) {
                this.value = value;
        }

        public BinaryNode getLeftChild() {
                return leftChild;
        }

        public void setLeftChild(BinaryNode leftChild) {
                this.leftChild = leftChild;
        }

        public BinaryNode getRightChild() {
                return rightChild;
        }

        public void setRightChild(BinaryNode rightChild) {
                this.rightChild = rightChild;
        }

        @Override
        public String toString() {
                return "BinaryNode: " +
                                "value=" + value;
        }
}

Second, print the nodes in level order, that is, the root node first, then the children of the root node, then the grand-children, etc. It is recommended that you accomplish this by using a queue to store the nodes, printing the first nodes that have been added to the queue.

Your program should print the following when it runs.

42 27 50 21 38 60 33 41 72

Submit the file LevelOrder.java when done.

You are scheduled to receive a $1,000 cash flow in one year, a $1,500 cash flow in two years, and pay a $700 payment in three years. If interest rates are 8 percent per year, what is the combined present value of these cash flows? (Round your answer to two decimal places.)

TCU Corp. pays a current dividend of $5 per year, which is expected to grow by 10% the next two years, then by 6% for the following two years, and from year 5 and on maintain a 3% constant growth. The discount rate is 8%. Calculate the current price of one share of TCU Corp.

A sleep center hypothesizes that people who sleep only four hours will score lower than people who sleep for eight hours on a cognitive skills test. The center recruited 20 participants and split them into two groups, giving one group 8 hours of sleep and the other only 4 hours. The following morning, the CAT (Cognitive Ability Test) was conducted, with scores ranging from 1-9, 9 being the best score. Use this information to answer questions . CAT Scores Group X: Eight hrs sleep 4 7 9 4 3 3 8 6 3 7 Group Y: Four hrs sleep 7 8 1 4 2 3 5 2 7 4 Conduct the following hypothesis test: - A one-tail T-test for a two-sample difference in means at the 95% confidence level - with Null Hypothesis that the Group X mean CAT score is equal to the Group Y mean CAT score - and with Alternate Hypothesis that the Group X mean CAT score is greater than the Group Y mean CAT score a). Calculate the mean and standard deviation of the scores for each group. (10%)

b)Using the correct degrees of freedom (df = group X size + group Y size ̶ # of groups), the correct number of tails, and at the correct confidence level, determine the critical value of t. (10%)

c). Explain under which scenarios using a pooled variance be inadvisable, then, calculate the pooled variance (formula for S2 is on page 379) for the groups. (10%)

d). Calculate the test statistic, Ttest (formula for t is on page 380). (10%)

e). The sleep center’s statistician tells you that the p-value for the test is 0.1535. Summarize the result of the study. Compare the mean scores in each group. Compare the test statistic to the critical value. Compare the p-value to alpha. Do you find a statistically significant difference between Group X and Group Y on cognitive test performance? Is there a meaningful/practical difference? Explain your decisions and Justify your claims

Consider the market for the EppiPencil, a device which calibrates and auto-injects the drugepinephrine in order to combat an allergic reaction. Assume the initial price of the drugwas $50 per unit, and at that price there were 2,000 units sold. Miland, the manufacturerof the EppiPencil, has hired you as an economic consultant. You are tasked with increasingrevenues for the company. After some research, you discover that if you raise the price of theEppiPencil to $75, consumers will be willing to purchase 1,500 units.

Based on the information above:1. At the initial price of $50 per EppiPencil, how much revenue would the total salesof 2000 EppiPencils create for Miland?:Revenue= $– If you recommend the option to raise the price to $75 and sell 1500 EppiPen-cils:2. At the new price of $75 per EppiPencil, how much revenue would the total sales of1500 EppiPencils create for Miland?:Revenue= $3. Calculate the Percentage Change in Price: ∆P=%4. Calculate the Percentage Change in Quantity Demanded (be careful with the sign):∆Qd=%5. Calculate the Price Elasticity of Demand (DO NOT use the Mid-Point Method)(DONOT take the absolute value): (be very careful with the sign)εpd=6. Based on your answer above, Demand for EppiPencils would be considered:(a) Perfectly Inelastic(b) Inelastic(c) Unit Elastic(d) Elastic(e) Perfectly Elastic–****Assuming the same Price Elasticity of Demand calculated above:****7. If you instead recommended that Miland lower the price from $50 to $40, how manyEppiPencils would you expect to sell?Qd=8. At the new price of $40 per unit, how much revenue would the total sales of Ep-piPencils create for Miland?:Revenue= $– Based on all of the information above:9. If Milandraisesthe Price of EppiPencils (from $50 to $75), total revenues collectedwill(increase/decrease).10. If Milandlowersthe Price of EppiPencils (from $50 to $40), total revenues collectedwill(increase/decrease).11. Therefore, in order to meet Miland’s goal of maximizing revenues, from the followingoptions you should recommend that Miland:(a) Decrease the price to $40(b) Maintain the price at $50(c) Increase the price to $752

Let’s take this a step further, and assume that Miland actually cares aboutmaximizing Profits, and not specifically revenues.– Assume that Miland faces a constant Marginal Cost of $45 per EppiPencilit produces.12. Calculate the Net Profit that Miland will earn if EppiPencils are sold at a price of$40 each. :Profit= $13. Calculate the Net Profit that Miland will earn if EppiPencils are sold at a price of$50 each. :Profit= $14. Calculate the Net Profit that Miland will earn if EppiPencils are sold at a price of$75 each. :Profit= $15. Therefore, in order to meet Miland’s goal of maximizing PROFIT, from the followingoptions you should recommend that Miland:(a) Set the price at $40(b) Set the price at $50(c) Set the price at $75

A large automobile insurance company wants to test the null hypothesis that the mean age in its population of policyholders is 50, against the alternative hypothesis that it is different from 50. In a random sample of 361 policyholders, the average age is 47.2 years, and the variance is 121 (squared years). The significance level is 5%.

1. What is the population?

a. Bernoulli. Xi , i = 1,…,n are i.i.d. Bernoulli random variables with success probability p

b. Normal.

c. General (arbitrary)

2. Give the value of the critical value (cv) if the rejection region has one critical value or the value of the smaller critical value (cv1) if the rejection region has two critical values. One decimal.

3. Give the value of the larger critical value (cv2) if the rejection region has two critical values. If the rejection region has only one critical value, answer NA. One decimal.

4. What is the conclusion of the test?

a. Fail to reject H0 (accept H0)

b. Reject H0 in favor of HA