The Kb for an amine is 8.695 × 10-5. What percentage of the amine is protonated if the pH of a solution of the amine is 9.207? (Assume that all OH– came from the reaction of B with H2O.)
In: Chemistry
The variables collected for this sample are average starting salary upon graduation ($), the percentage of applicants to the full-time program who were accepted, the average GMAT test score of students entering the program, program per-year tuition ($), and percent of students with job offers at time of graduation.
| University | Tuition per year ($) | Average GMAT score | Acceptance Rate (%) | Graduates employed at graduation (%) | Average starting salary and bonus ($) |
| 1 | 61875 | 732 | 7.1 | 73.6 | 142834 |
| 2 | 58875 | 726 | 11.0 | 76.9 | 144750 |
| 3 | 62424 | 728 | 20.7 | 84.3 | 142574 |
| 4 | 61520 | 724 | 23.5 | 87.4 | 137615 |
| 5 | 63454 | 713 | 13.8 | 79.6 | 142936 |
| 6 | 61596 | 713 | 23.2 | 80.7 | 136357 |
| 7 | 63148 | 716 | 18.2 | 75.7 | 139006 |
| 8 | 61605 | 716 | 22.1 | 83.8 | 142489 |
| 9 | 60744 | 721 | 18.1 | 74.9 | 135933 |
| 10 | 58000 | 690 | 25.1 | 81.8 | 137154 |
| 11 | 58975 | 719 | 23.7 | 69.4 | 126871 |
| 12 | 58192 | 692 | 30.0 | 79.6 | 132316 |
| 13 | 51500 | 699 | 26.7 | 84.5 | 111974 |
| 14 | 58300 | 687 | 31.2 | 75.5 | 131865 |
| 15 | 48100 | 678 | 30.7 | 81.7 | 128347 |
| 16 | 52200 | 691 | 47.4 | 70.3 | 118938 |
| 17 | 46800 | 686 | 34.8 | 71.7 | 115694 |
| 18 | 51786 | 684 | 31.6 | 64.4 | 114129 |
| 19 | 47950 | 688 | 41.3 | 77.1 | 113830 |
In: Statistics and Probability
If demand is price inelastic, a decrease in price will cause a
a. larger percentage increase in quantity demanded than the percentage decrease in price,
thereby decreasing total revenue.
b. smaller percentage decrease in quantity demanded than the percentage decrease in price,
thereby decreasing total revenue.
c. smaller percentage decrease in quantity demanded than the percentage decrease in price,
thereby increasing total revenue.
d. larger percentage decrease in quantity demanded than the percentage decrease in price,
thereby decreasing total revenue.
e.none of these choices are correct
. Suppose that there is a recession and you observe that the market price of new cars decreases and
the market price of used cars increases. This observation is consistent with:
8. Suppose that builders of new single family homes and prospective first time buyers of single
family homes believe that housing prices will fall in the future. This would lead to:
. The demand for good X will be more elastic
a. the larger the number of substitutes
b. the larger percentage good X takes in the consumer's budget.
c. the longer the time period consumers have to adjust to a change in the price of good X
e. all of these answers are correct
In: Economics
What is the percentage change in the R-value of the window if double glazed window is used with 6.4 mm and 12.7 mm air in between as compared to single glazed window? Does the resistance increase linearly with the thickness of the space?.
In: Mechanical Engineering
Using SPSS calculate the grad_rate variable as a percentage and save the data with the new variable. And list the steps using transform, compute then ?????
grad_rate
189259
31967
283867
105468
1998766
307961
190044
41283
816946
468360
73472
66871
798362
297250
172115
157023
185574
183852
53357
339891
454219
434937
350909
120894
300234
48068
107058
109514
65715
520299
74586
1302196
462802
43893
537219
152441
194831
654558
53777
205399
42317
268430
1143206
168410
30737
477103
373615
64730
291007
24821
In: Statistics and Probability
What percentage of American workers get paid above minimum wage? In general, why do such workers get paid more than the government-mandated minimum wage?
In: Economics
a) The percentage of adults who have at some point in their
life been told that they have hypertension is 23.53%. In a sample
of 10 adults, let X be the number who have been told that
they have hypertension. Consider the following probability
distribution for X.
Find the missing entry that is labelled as 'a'. (answer to 4 decimals) |
| (b) |
[2 marks] Suppose that a group of 10 adults are randomly selected, and 6 of them have been told that they have hypertension. Is this a significantly high number that would suggest that the given percentage of adults who have been told that they have hypertension (i.e., 23.53%) is not correct?
|
In: Statistics and Probability
Turner, Inc. began work on a $7,000,000 contract in 2021 to construct an office building. During 2021, Turner, Inc. incurred costs of $1,700,000, billed its customers for $1,200,000, and collected $960,000. At December 31, 2021, the estimated future costs to complete the project total $3,300,000. Make Turner’s 2021 journal entries using the percentage-of-completion method.
In: Accounting
Let x be the age of a licensed driver in years. Let y be the percentage of all fatal accidents (for a given age) due to failure to yield the right of way. For example, the first data pair states that 5% of all fatal accidents of 37-year-olds are due to failure to yield the right of way.
| x | 37 | 47 | 57 | 67 | 77 | 87 |
| y | 5 | 8 | 10 | 13 | 31 | 41 |
Complete parts (a) through (e), given Σx = 372, Σy = 108, Σx2 = 24814, Σy2 = 3000, Σxy = 7956, and r ≈ 0.927.
(a) Draw a scatter diagram displaying the data.
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Submission Data |
(b) Verify the given sums Σx, Σy,
Σx2, Σy2, Σxy, and
the value of the sample correlation coefficient r. (Round
your value for r to three decimal places.)
| Σx = | |
| Σy = | |
| Σx2 = | |
| Σy2 = | |
| Σxy = | |
| r = |
(c) Find x, and y. Then find the equation of the
least-squares line = a + bx. (Round
your answers for x and y to two decimal places.
Round your answers for a and b to three decimal
places.)
| x | = | |
| y | = | |
| = | + x |
(d) Graph the least-squares line. Be sure to plot the point
(x, y) as a point on the line.
(e) Find the value of the coefficient of determination
r2. What percentage of the variation in
y can be explained by the corresponding variation
in x and the least-squares line? What percentage is
unexplained? (Round your answer for r2
to three decimal places. Round your answers for the percentages to
one decimal place.)
| r2 = | |
| explained | % |
| unexplained | % |
(f) Predict the percentage of all fatal accidents due to failing to
yield the right of way for 75-year-olds. (Round your answer to two
decimal places.)
%
In: Statistics and Probability
Based on pKas of glycine hydrochloride estimate the percentage of molecules that are fully protonated in a solution with pH = 4.4
pKa1 = 2.35 ,pKa2 = 9.60 , MW = 111.6
In: Chemistry