Answer the following questions regarding the synthesis and analysis of a Nickel coordination compound
a. Why is it necessary to wash the filtered Ni(NH3)nCl2 crystals with concentrated NH3?
b. What method is used to determine the amount of NH3 in the coordination compound?
c. What method is used to determine the amount of Ni2+ in the coordination compound?
d. Calculate the absorbance of a sample with a %T of 3.98.
e. What is the concentration of Ni2+ in an unknown sample whose absorbance is 0.45 if a standard solution of 2M Ni2+ had an absorbance of 0.3?
In: Chemistry
There are 3 users, Smart, Tab, or PC that attempt to access an online store. The probability that seeing a smart is 0.5, Tab is 0.25, PC is 0.25. They either request either audio or video. Smart request audio with probability 0.5; tab request audio with probability of 0.4; and PC request audio with probability 0.3.
a) What is the probability that a user request video is a tablet?
b) What is the probability that a user request audio is a smart?
c) What is the probability that a user is PC and request video?
In: Statistics and Probability
1. In 2021 there will be 3 candidates for the post of
Director- Mr. Arun, Mr. Varun, and Mr.
Tharun- whose chances of getting the appointment are in the
proportion 3: 2: 4 respectively.
The probability that Mr. Arun if selected would introduce
online-teaching in the college is
0.3. The probabilities of Mr. Varun and Mr. Tharun doing the same
are respectively 0.5 and
0.8. (a) What is the probability that there will be online-teaching
in the college in 2022? (b) If
there is online-teaching in the college in 2022, what is the
probability that Mr. Tharun is the
In: Statistics and Probability
Three children, each of mass 15 kg, ride at the edge of a frictionless merry-go-round of mass 163 kg and radius 1.2 meters. The children jump off outward, directly away from the center, taking zero angular momentum with them. If the angular velocity of the merry-go-round before they jumped was = 0.3 rad/s, what is its angular velocity after they jump?
Treat the merry-go-round as a solid cylinder.
2 sig figs, units (rad/s)
In: Physics
From one year to the next, a country’s output rose from 4,000 to 4,500, its capital stock rose from 10,000 to 12,000, and its labor force declined from 2,000 to 1,750. Suppose aK = 0.3 and aL = 0.7. 11. How much did capital contribute to economic growth over the year? 12. How much did labor contribute to economic growth over the year? 13. How much did productivity contribute to economic growth over the year?
In: Economics
Assume that you set up a portfolio composed of Stock A and Stock B. You invested 40% of your capital on Stock A whereas 60% of your capital on Stock B. During the last 3 years, your portfolio showed the following performance.
|
Stock A |
Stock B |
|
|
2016 |
0.1 |
-0.1 |
|
2017 |
0.2 |
0 |
|
2018 |
0.3 |
0.4 |
What are your average portfolio return and risk (standard deviation or variance) during last three years? (20 points)
In: Finance
Assume that you set up a portfolio composed of Stock A and Stock B. You invested 40% of your capital on Stock A whereas 60% of your capital on Stock B. During the last 3 years, your portfolio showed the following performance.
|
Stock A |
Stock B |
|
|
2016 |
0.1 |
-0.1 |
|
2017 |
0.2 |
0 |
|
2018 |
0.3 |
0.4 |
What are your average portfolio return and risk (standard deviation or variance) during last three years? (20 points)
In: Finance
Suppose the probability that the probability of rain today in Vernon is 0.4 and the probability of rain today in Kelowna is 0.3. The probability that it will rain in both cities today is 0.2. A) What is the probability that it will rain in Kelowna or Vernon today? B) What is the probability that it will rain Kelowna today but not in Vernon? C) Suppose that it has started to rain in Kelowna today. What is the conditional probability that it will also start to rain in Vernon today? D) Is the event that it will rain today in Kelowna independent of the event that it will rain today in Vernon?
In: Statistics and Probability
Two tennis players, A and B, are playing in a tournament; the
first person to win 3 sets is declared the winner of the match
(best of 5. no ties allowed) Assume that A is stronger and wins
each set with probability of 0.6 and the outcome of each set is
independent of other sets.
a.) What is the probability player A will win the match? (With explanation)
b.) Let A and B be events such that P(A) = 0.45, P(B) = 0.3, and P(A U B) = 0.6. Find P(A|B) and P(B|A). (With explanation) Thanks!!!!!!
In: Statistics and Probability
A)The change of fish density is provided by the gas of negligible density in the fish bladder. If fish body density is 1.067 g/cm^3 , calculate the volume of the swim bladder (as percent of the total volume of fish) providing with the average density of 1.024 g/cm^3 .
B)When the rate of blood flow in aorta is 5 Liter/min , the velocity of the blood in capillaries is about 0.3 min/sec .
If the average diameter of capillary is 0.01 mm , calculate how many billions of capillaries in circulatory system.
In: Physics