1.

Calculate the ΔG°rxn (in kJ) using the following information.

                  4 HNO3(g) + 5 N2H4(l) → 7 N2(g) + 12 H2O(l)   ΔG°rxn = ?

ΔH°f (kJ/mol) -115.6 46.4 -268.0

S°(J/mol∙K) 216.9 102.1 289.0 66

2. Consider the following reaction at constant P. Use the information here to determine the value of ΔSsurr at 67º C. (Answer in J/K. If answer is negative, input - sign).  

2 NO(g) + O2(g) → 2 NO2(g) ΔH = -156 kJ

3. Which statement is true for this system at standard conditions and at a temperature of 25'C?

4 A(g) + 3 B2(g) → 2 A2B3(g) ΔG°rxn = 224 kJ/mol

500kgh-1 of a 10% w/w solutionof a compoun X(OH)2 is to be treated using a 5% excess of 20% w/w solution of Na2CO3 to precipitate the X as its carbonate according to the balanced reaction equation: X(OH)2 + Na2CO3 ------> XCO3 + 2NaOH All the solid is filtered off but some solution remains with the solid such that the solution forms 4% w/w of the total mass removed. the filtered liquid product is then neutralised with 2 molar hydrochloric acid according to the reactions NaCO3 + 2HCl -----> 2NaCl + H2O + CO2 NaOH + HCl -----> NaCl + H2O Calculate: 1. the amount (kgh-1) of sodium carbonate solution required. 2. the amount (kgh-1) and composition (%w/w) of the solid product after filtration 3. the amount (kgh-1) and composition (%w/w) of the solid product after filtration. 4. the amount of acid (in litres per hour) required for neutralisation data: Relative atomic mass of X= 40, O=16, H=1, Na= 23, C= 12, Cl= 35.5

Which of the follwoing for a-j is true? The following information is available for an MRP problem. The BOM file shows that Product A is made of one unit of Part B, two units of Part C, and three units of Part D. Part C is made of two units of Part E and three units of Part F. Checking the correct statements results in earning credits, while checking incorrect statements results in losing a half of a correct statement.

The Master Production Schedule requirements for the finished product are as follows (in millions):

A study of fox rabies in a country gave the following information about different regions and the occurrence of rabies in each region. A random sample of

n₁ = 16

locations in region I gave the following information about the number of cases of fox rabies near that location.

x₁:

   Region I Data

A second random sample of

n₂ = 15

locations in region II gave the following information about the number of cases of fox rabies near that location.

x₂:

   Region II Data

(i) Use a calculator with sample mean and sample standard deviation keys to calculate x₁ and s₁ in region I, and x₂ and s₂ in region II. (Round your answers to two decimal places.)

(ii) Does this information indicate that there is a difference (either way) in the mean number of cases of fox rabies between the two regions? Use a 5% level of significance. (Assume the distribution of rabies cases in both regions is mound-shaped and approximately normal.)
(a) What is the level of significance?

A project involves the following activities, their predecessors, and the times (in weeks) associated with each activity.

a.   Draw a complete network for the above.

b.   Determine the critical path and list all the activities that are on the critical path. What is the expected project completion time?

c.   Develop the detailed activity schedule for the project.

d.   What is the probability that the project will be finished in 21 weeks or less?

e.   What is the probability that the project will take between 19 to 21 weeks to be completed?

f.    If we want a 95% chance of completing the project on time, how far ahead of the schedule meeting time should the project be started?

g.   If activity F is delayed and takes 10 weeks to complete, would the project completion time be any different? If yes, what would be the critical path and the expected completion time?

What is the return on equity for a bank that has an equity multiplier of 10, an interest expense ratio of 5%, and a return on assets of 2%? 1) 15.4% 2) 9.1% 3) 11.8% 4) 20.0% 5) 7.0%

Data Table 2: Moles of CH3COOH Reaction # Volume of CH3COOH (mL) Mass of CH3COOH (g) Moles of CH3COOH 1 2 3 4 5 6 how do i convert to ml?

For what values of k (if any) do the following three vectors span (a) a line, (b) a plane, or (c) all of R³? (1, 2, 3),(3, k, k + 3),(2, 4, k)

Calculate the energy gap in J, kJ/mol, eV, and wavenumber (cm^-1) between the level n = 5 and n = 1 of an electron confined to a microscopic 1-D box of length 2.00 Angstroms.

  1- J
  2- kJ/mol
  3 -eV
  4- cm^-1

5. Given the data shown in table 1 on the total utilities of plain chocolate bar and milk chocolate bar. And given that the price of plain chocolate bar is 20 cents and the price of milk chocolate bar is 40 cents.

1. Calculate marginal utility for plain and milk chocolate bar.
2. Calculate marginal utility per dollar spent for plain and milk chocolate bar.
3. Draw total utility and marginal utility curves. Margin utility