Explain generally the development of the modern picture of the atom – include the contributions from Dalton’s atomic theory, Nuclear Theory, the empirical data from the Balmer-Rydberg equation, the Bohr Model, and quantum mechanics.
Give an overview of quantum mechanics. Include the concepts of the wave function and each of the four quantum numbers.
Explain how polarity and dipole moment relate to the concept of the intermolecular attractions in substances. Compare and contrast attractive forces of hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Your answer should be more in depth than just defining the three terms.
In: Chemistry
Answer the questions completely with complete calculations.
1. what is the oxidation number of elements in BrO2-, BrO3- & BrO4-, Br2, Br-?
2. In the reaction 4 NH3 (g) + 5 O2 (g) --> 4 NO (g) + 6 H2O (l)
750 g NH3 is mixed with 750 g of O2.
a. what is the amount of NO produced in this reaction?
b. Which is the limiting reagent?
c. How much of the excess reagent remains?
d. The actual yield of NO obtained was 400g. What is the % yield of NO?
3. A compound of 49.4% K, 20.3% S, and 30.3% O by mass. What is the empirical formula of the compound?
In: Chemistry
In: Physics
a) Is it appropriate to reject a Since normative theory prescriptions could not be confirmed through empirical observations, is it appropriate to reject it?•b)Why are financial accounting standards considered to be the outcome of a political process? Why is the process ‘political’? •c) How is a decision by a government regulator that all companies must separately disclose, in their annual financial reports, the amount of expense incurred in relation to the training of employees and that the companies must also spend at 5% of their reported profits on training employees related to the Public Interest Theory? •d) Explain the decision made by the government regulator in (c) above in terms of the Economic Interest Group Theory of regulation.
In: Accounting
A student received the following grades.
C in Math 120 worth 4 credits.
B in English 125 and worth 3 credits
A in Chem 102 and worth 5 credits.
X ( x - µ ) (x - µ )2
2
5
6
In: Statistics and Probability
State whether the question is True or False and Explain your answer. A diagram or equation may be helpful to explain your answer.
a. Constant Returns To Scale implies that doubling the inputs (e.g. capital and labor) of the production function will double output.
b. Development accounting, which is the empirical analysis that uses the production function to explain differences in GDP p.c. across countries, finds that differences in capital per capital across countries can explain MOST of the differences in GDP pc.
c. Total Factor Productivity (TFP) is usually measured empirically as an implied residual from the production function.
In: Economics
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1: A square footing is to be constructed as shown in the Figure at a founding depth of 2 m. Using the Terzaghi equation compute the ultimate surface capacity, [ (qult)Surf ], possible for the layered soil profile shown. Keeping in mind that Terzaghi’s semi-empirical bearing capacity equation can only be applied to a soil layer with a thickness greater than or equal to the applied stress contact-area-breadth (either virtual or real breadth). In such a case, second layer cannot be assessed by the nominal equation of Terzaghi. An acceptable approach is to merge the second and third layers into a single layer with equivalent conservative properties. |
In: Civil Engineering
Research Analysis Based on your readings from the textbook and lectures, answer the following questions regarding your research. Select a peer-reviewed empirical article. Read through method and measurement, and identify each measured variable according to the scale upon which it was measured, and explain why you chose that particular scale of measurement. What are the variables you will be using in your research project for this class? Describe each of them. What scale(s) of measurement are you using for each? Submission Details Please provide your answers in a 3- to 4-page Microsoft Word document.
In: Psychology
There is some evidence that, in the years 1981-85 , a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw, "Does it pay to change your company's name? A stock market perspective," Marketing Science v., pp.320-35, 1987 .) Suppose that, to test the profitability of name changes in the more recent market (the past five years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about 0.72%, with a standard deviation of 0.11%. Suppose that this mean and standard deviation apply to the population of all companies that changed names during the past five years. Complete the following statements about the distribution of relative increases in stock price for all companies that changed names during the past five years. (a) According to Chebyshev's theorem, at least 36% of the relative increases in stock price lie between ___ and ___ . (Round your answer to 2 decimal places.) (b) According to Chebyshev's theorem, at least ___of the relative increases in stock price lie between 0.50 % and 0.94 %. (c) Suppose that the distribution is bell-shaped. According to the empirical rule, approximately ___ of the relative increases in stock price lie between 0.50 % and 0.94 %. (d) Suppose that the distribution is bell-shaped. According to the empirical rule, approximately 99.7% of the relative increases in stock price lie between ___and ____ .
In: Statistics and Probability
Answer the questions completely with complete calculations.
1. Balance the following equation & fill in the state of the chemicals.
a. Fe2 (SO4)3 (aq) + NH3 (aq) + H2O (l) --> Fe (OH)3 ( ) + (NH4)2SO4 ( )
2. How many atoms of oxygen are present in 1.75 g sample of Fe2 (SO4)3?
3. Calculate the percentage of Cl by mass in PCl5
4. Predict whether each of the following ionic compounds is likely to be water soluble.
KCl _____; MgCO3 ____
Fe2O3 ____; Cu(NO3)2 _____
In which compound will the bulb be lit most brightly? why?
5. What is the oxidation number of element in BrO2-, BrO3- & BrO4-, Br2, Br-?
6. In the reaction 4 NH3 (g) + 5 O2 (g) --> 4 NO (g) + 6 H2O (l)
750 g NH3 is mixed with 750 g of O2.
a. what is the amount of NO produced in this reaction?
b. which is the limiting reagent?
c. How much of the excess reagent remains?
d. The actual yield of NO obtained was 400g. What is the % yield of NO?
7. A compound of 49.4% K, 20.3% S, and 30.3% O by mass. What is empirical formula of the compound?
8. How many grams of a sample of NaNO3 should be dissolved in a 150.0 mL of water to give a 0.22 M solution?
9. A certain alcohol contains only three elements C, H & O. Combustion of 50.00 g sample of the alcohol produced 95.50 g of CO2 and 58.70 g of H2O. What is the empirical formula of the alcohol?
In: Chemistry