Which of the following is the conjugate acid of H₂S?

Select one:

a. H3S+

b. H+

c. H2SO4

d. HS-

e. S

Which of the following is a weak acid?

Select one:

a. salicylic acid

b. hydrochloric acid

c. sulfuric acid

d. hydrobromic acid

e. nitric acid

Which of the following is the conjugate base of H₂S?

Select one:

a. SO2

b. S

c. OH-

d. SH-

e. H3S+

If the [H+] = 1.0 x 10^-9, what is the pH?

Select one:

a. 1.0 x 10-5

b. 1.0 x 10-9

c. 5

d. 1.0 x 10-14

e. 9

If the [H+] = 1.0 x 10^-9, what is the [OH-]?

Select one:

a. 1.0 x 10-14

b. 1.0 x 10-5

c. 5

d. 9

e. 1.0 x 10-9

4-2 Short Paper: Major Contributions of Minority Groups Assignment Task: Submit to complete this assignment Trace some of the major contributions of an ethnic or "minority" group to U.S. culture, for example, to music, the arts, dance, or theater. There are many other possibilities! Develop your composition based on an area of interest to you in the arts.

A Theater has n numbered seats, and n tickets are distributed among n persons. Compute the probability that

(a) exactly two persons will be seated at seats corresponding to their ticket numbers if all the seats are occupied at random.

(b) at least two persons will be seated at seats corresponding to their ticket numbers if all the seats are occupied at random.

Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To determine if the spark plugs average 22,100 miles, what is the critical value for the test using a 0.05 level of significance?

A) t = +2.110

B) t ≠ ±2.110

C) t = -2.110

D) t = ±2.110

Select the taxpayer who meets the distance requirement for deducting moving expenses. A)Bill's new workplace is half a mile from his old home. His old home is 60 miles form his old workplace. B) Connie's new workplace is five miles from her old home. Her old home is two miles from her old workplace. C)Danica just completed U.S. Air Force basic training and is moving to her first duty station. D) Yuri's new workplace is 65 miles from his old home. His old home is 25 miles from his old workplace.

You know that there is a problem in your car due to sounds you hear when driving. There can be only two sources for the problem 1) Brakes 2) Engine. You are estimating that the problem is due to brakes with probability 0.6, and it is due to engine with probability 0.4. Furthermore, if the problem is due to brakes or engine, the number of miles you can drive without any repair is exponentially distributed with mean 500 and 100 miles, respectively.

a) What is the probability that the number of miles you can drive the car without any repair is larger than 200 miles.?

b)What is the expected number of miles you can drive the car without any repair?

A trucking company determined that the distance traveled per truck per year is normally​ distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts​ (a) through​ (c) below.

a. What proportion of trucks can be expected to travel between 53 and 70 thousand miles in a​ year? (Round to four decimal places as​ needed.)

Make an ungrouped frequency distribution for Price/Sales. Use the frequency distribution to find the mean, median, mode and standard deviation for Price/Sales ratio. (Note the boldface – must show and describe steps for how you USED the frequency distribution to compute the statistics)

A hotel manager is looking to enhance the initial impression that hotel guests have when they check in. Believed to contribute to initial impressions is the time it takes to deliver a guest’s luggage to his or her room after check-in. A random sample of 20 deliveries on a particular day were selected from Wing A of the hotel, and a random sample of 20 deliveries were selected in Wing B (i.e., the Excel tab LUGGAGE).

(a) Identify which type of test is most appropriate for you to use, justify your answer.

(b) Determine whether or not the mean delivery time differs for the two wings of the hotel (use α = .05).

(c) If faster luggage delivery time is positively related to guests’ initial impression, which wing(s) should receive the highest impression ratings?