What is the significance of the slope. Use a significance level of 0.05

What is the coefficient of determination

Do the following.

d) For each country test at 5% level if the mean for March is different from the mean for April using 10 paired samples.

1) 2-Fluorobenzoic acid has a pKa of 3.27. 4-Nitrobenzoic acid has a pKa of 3.41. p-Cresol has a
pKa of 10.26. Acetanilide is neutral. You will need the following information: The pKa of HCl is
–7; pKa of carbonic acid is 6.52 and the pKa of water is 15.
Mixture A is a mixture of 2-fluorobenzoic acid and p-cresol
Mixture B is a mixture of 4-nitrobenzoic acid and p-cresol
Mixture C is a mixture of 2-fluorobenzoic acid and 4-nitrobenzoic acid.
All mixtures are dissolved in methylene chloride.

a) What substance (among HCl, NaOH and NaHCO3) could you use to separate the components
of Mixture A? What substance would exist in the aqueous layer AFTER the extraction?

b) Why would reacting Mixture B with an aqueous solution of NaOH NOT separate one
substance from the other?

c) Why would reacting Mixture C with an aqueous solution of NaHCO3 NOT separate one
substance from the other?

2) The distribution coefficient between methylene chloride and water for solute Y is 12. An
amount of 95.0 g of Y is dissolved in 120 mL of water.

a) What weight of Y would be removed from water with a single extraction with 120-mL of
methylene chloride? Report to 1 decimal place.

b) What weight of Y would be removed from water (the original solution) with two successive
extractions with 60-mL portions each of methylene chloride? Report to 1 decimal place.

In what case would column chromatography be used to purify a desired compound because techniques like recrystallization, extraction and distillation are not adequate to do so?

2) You have 122.0 g of solute Q dissolved in 150-mL of water. The distribution coefficient between ether and water for solute Q is 9.

a) Finish the probability table

b) Define Y = -2X+6 .

c) Calculate E(X) Std(X) E(Y) Std(Y)

determine (1) % Fe in unknown sample

(2)average % Fe

(3)standard deviation

(4)relative standard deviation

For gravimetric determination of Iron as Fe2O3, how do I calculate?

weighed sample of unknown containing Fe to produce ~0.3g of Fe2O3 (~0.6 - 1 g of unkonwn)

I got 0.75g from unknow sample.

I got 0.05g from Fe2O3 collected from unknow.

P19.3 (LO 1, 2, 4) (Second Year of Depreciation Difference, Two Differences, Single Rate, ­Discontinued Operation) The following information has been obtained for Gocker Corporation.

1.    Prior to 2020, taxable income and pretax financial income were identical.

2.    Pretax financial income is $1,700,000 in 2020 and $1,400,000 in 2021

. 3.    On January 1, 2020, equipment costing $1,200,000 is purchased. It is to be depreciated on a straight-line basis over 5 years for tax purposes and over 8 years for financial reporting purposes. (Hint: Use the half-year convention for tax purposes, as discussed in Appendix 11A.)

4.    Interest of $60,000 was earned on tax-exempt municipal obligations in 2021.

5.    Included in 2021 pretax financial income is a gain on discontinued operations of $200,000, which is fully taxable.

6.    The tax rate is 20% for all periods.

7.    Taxable income is expected in all future years.

Instructions

a.    Compute taxable income and income taxes payable for 2021.

b.    Prepare the journal entry to record 2021 income tax expense, income taxes payable, and deferred taxes.

c.    Prepare the bottom portion of Gocker's 2021 income statement, beginning with “Income from continuing operations before income taxes.”

d.    Indicate how deferred income taxes should be presented on the December 31, 2021, balance sheet.

1. Cut the design using REGULAR paper and CONSTRUCTION paper
2. Throw the helicopters 20 times for each paper type
   1. Inspect the helicopter every 5 throws and replace if damaged. MODEL DAMAGE WILL AFFECT THE LAB RESULTS.  

-----------------------------------------------RESULTS ABOVE------------------------------------------------------------------------------------------------------------------------

For each paper combination

1. Compute in Minitab
   1. Mean
   2. Standard Deviation
   3. Variance
   4. Range
   5. Mode
   6. Test if flying times for each material follows a normal distribution
2. Draw in Minitab
   1. Boxplot that includes both materials
   2. Dot plot that includes both materials
   3. Interval plot that includes both materials
   4. Evaluate if outliers are present
3. Use the step by step procedure and test
   1. Determine if the variance of the flying time for both types of paper is equal
   2. Determine if the mean the flying time for both types of paper is equal
   3. Determine which one MAXIMIZES FLYING TIME
4. Methodology - Flowchart Diagram

write a MATLAB script that plots the two functions ( y=(2x^2)-(3x)-4 and y=4sin(2Pix) - 1 ) in the same figure for x in [-1,3]. Add a title, x-label, y-label, and legend. ( MATLAB code and graph with all descriptions.)