Blog

Hydrogen fluoride is produced industrially by the action of sulphuric acid on CaF2.

Calculate the concentrations of the major ionic species in units of mol/L (M).

a) Sodium ion concentration?

b) Carbonate ion concentration?

• Concentrated ammonia is 14.8 M. What volume of this solution should be used to prepare 1.85 L of 0.500 M NH3?
• Hydrogen fluoride is produced industrially by the action of sulphuric acid on CaF2. Suppose 278 kg of CaF2 is treated with an excess of sulphuric acid and 127 kg of HF is produced.

a) What is the percent yield of HF? In percent

b) How much CaF2 remains unreacted? In kg

• If the oxidation reaction is 76.5 % efficient, what mass of cyclohexane is required to produce 3.43 kg of adipic acid? Answer in kg
• How many atoms of each kind are represented in the formula Ni(ClO4)2? Name the elements present.

a)What do the parentheses mean? Are there three groups or should you multiply by the subscript of the parentheses?

b)How many ClO4 groups are there?

The post Hydrogen fluoride is produced industrially by the action of sulphuric acid on CaF2. appeared first on superioressaypapers.

Literature Review

two pages literature review single spaced

all the instruction are in the attachment plus the article that needed to make the review of

The post Literature Review appeared first on superioressaypapers.

Literature Review

Read the paper: “Dissolved oxygen control of the activated sludge wastewater treat-

ment process using model predictive control,” Computers and Chemical Engineering, vol 32, 1270-1278, 2008, and write a note about that paper. Please submit the printed hard copy. Handwriting version is not accepted.

You need to show and discuss the following contents. Please do not copy and paste any sentences from that paper.

ˆ Motivations (10 pts.): why is this work important from the industrial or academic perspective?

ˆ Methodologies (10 pts.): including the modeling and controller design methods.

ˆ Your questions about the method in this paper (10 pts.): Model predictive control is the state-of-the-art technique for industrial automation. It is very normal that students cannot easily understand its concept. List all your questions on this method.

ˆ Comments with critical thinking (10 pts.): List advantages & drawbacks of the proposed method. Provide your suggestions or possible improvement.

Format Requirement (10 pts.): Print your review on A4 paper, at least two full pages (not including references), single space, Times New Roman 12, margins 1 inch on all sides, no figure. Please list references in the end of this review (You can follow the reference format of Computers and Chemical Engineering). If your report does not meet above requirements, then you can obtain at most 1 point in this part.

The post Literature Review appeared first on superioressaypapers.

Chemical Engineering

Dissolved oxygen control of the activated sludge wastewater treat-

ment process using model predictive control,” Computers and Chemical Engineering, vol 32, 1270-1278, 2008, and write a note about that paper. Please submit the printed hard copy. Handwriting version is not accepted.

You need to show and discuss the following contents. Please do not copy and paste any sentences from that paper.

ˆ Motivations (10 pts.): why is this work important from the industrial or academic perspective?

ˆ Methodologies (10 pts.): including the modeling and controller design methods.

ˆ Your questions about the method in this paper (10 pts.): Model predictive control is the state-of-the-art technique for industrial automation. It is very normal that students cannot easily understand its concept. List all your questions on this method.

ˆ Comments with critical thinking (10 pts.): List advantages & drawbacks of the proposed method. Provide your suggestions or possible improvement.

Format Requirement (10 pts.): Print your review on A4 paper, at least two full pages (not including references), single space, Times New Roman 12, margins 1 inch on all sides, no figure. Please list references in the end of this review (You can follow the reference format of Computers and Chemical Engineering). If your report does not meet above requirements, then you can obtain at most 1 point in this part.

The post Chemical Engineering appeared first on superioressaypapers.

Considering the changing focus on health

Growth Champions:

Read Chapter 5 in Growth Champions then answer the following questions in no less than 500 words.

Describe how Nestle and Pepsi approached the changing health expectations of their products. Considering the changing focus on health and well-being, do you believe they were successful?

Be descriptive and provide specific examples.

The post Considering the changing focus on health appeared first on superioressaypapers.

Use RK-Soave EOS.

normal melting point and the standard heat of formation at 298°K (Hf) of 1,9 nonanediol. [3 points]

b) Find the normal melting point and the standard heat of formation at 298°K of 1,9-nonadiol in AspenPlus® using the NRTL equation of state. (1,9- Dihydroxynonane in the NISTV88 Database). [3 pts]

Quiz #1 (due at 6pm on 10/10)

2

1. Complete exercise 5.9(a) and (b) in the text. [8 pts]

For part (a): The objective is to calculate the mass of anhydrous salt and the mass of water that would be placed in the bag (before crystallization) for each of the four candidate salts. Assume that, upon the completion of crystallization at 40°C, each of the salts has the capacity to add 100g of water in addition to the equilibrium solubility of the salt (you will not need to use the supersaturation of 2 given in the problem statement) and that there is no heat lost during the process. (Hint: First calculate how much of each of the hydrated salts is required by energy balance. For that energy balance, the heat released from salt crystallization must equal the heat gained by the entire solution, i.e., the hydrated salt, the additional 100 g of water and the non-hydrated salt that dissolves into that 100 g of water. After you’ve determined the amount of hydrated salt required, you can then calculate the amount of each solid, non-hydrated, salt that you will need for the bag and the total amount of water.)

For part (b): To calculate the required dimensions, assume that the bag should be square in surface and fit a typical hand that is 8cm x 8cm. Assume densities are constant over the range of 20°C to 40°C (see Table). To calculate the amount of heat available, assume that the hand temperature is 32°C, so the available heat is that which is transferred from 32°C to 40°C.

Quiz #1

Material Density (g/cc)

NaC2H3O2 1.52

NaS2O3 1.67

Ca(NO3)2 2.50

Pb(C2H3O2)2 3.25

Water 1.00

3

1. a) Use Aspen Plus® to determine the flow rate of saturated vapor benzene at 176.2°F and 1 atm to be mixed with 100 lbmol/hr of liquid benzene to raise its temperature from 25°F to 50°F. For convergence, you will need a reasonable first guess at the flow rate (ΔHv=13200 BTU/lbmol and cp=0.42 BTU/lb°F). [4 pts]

b) Create a plot of vapor benzene flow rate (lb mol/hr) vs. mixer discharge temperature(°F). [3 pts]

1. a)Use Aspen Plus® to determine the heat required to vaporize 45 mol% of a liquid stream entering an evaporator (heater) at 150°F and 202 psia and containing:

Assume the evaporator product is at 200 psia. [4 pts] b)Generate a plot of heat input to the evaporator vs. exit quality (mol fraction

vapor between 0 and 1). [3 pts]

Use RK-Soave EOS for both of these problems

Quiz #1

lbmol/hr

Propane 250

n-Butane 400

n-Pentane 350

4

1. A simplified flowsheet for the “Cavett Problem” is shown below:

a) Use Aspen Plus® to determine the component flow rates and conditions for all streams in the process. [4 pts] b) At what temperature in the top stage will the n-butane flow in the overhead be less than 100 lb mol/hr? (all other conditions are as shown) [4 pts] b) Plot the pressure in the top stage (F1) from 280 to 1200 psia vs. the mole fractions of propane, isobutane and n-butane in the overhead. (temp=100°F)[4 pts]

The post Use RK-Soave EOS. appeared first on superioressaypapers.

Use the Beer’s Law lab (Lab 5) to write up a full report.

Using the data from Beer’s Lab/Data (Lab 5) and using the skills you have learned over the semester, write a full lab report (or scientific communication) on this experiment. Include the following parts in your report:

-Title.

-Abstract.

-Introduction.

-Procedure/Methodology.

-Results: include tables, equations, and calculations Discussion.

• I attached Lab 5 in case you want to have a look at it/

The post Chem Lab 10 appeared first on superioressaypapers.

 determine the sex of an individual are called:

Question options:

Hypophosphatemia (vitamin D-resistant rickets) is inherited as a sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia?

Question options:

All of their daughters and none of their sons exhibit hypophosphatemia.

Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.

All of their sons and none of their daughters exhibit hypophosphatemia.

Twenty-five percent of their offspring exhibit hypophosphatemia.

Question 2 2.5 / 2.5 points

In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples?

Question options:

DD

Dd

dd

DI

Question 3 2.5 / 2.5 points

Which of these techniques could tell you how gene expression differs between individuals with and without cystic fibrosis?

Question options:

Therapeutic cloning

DNA microarray

Reproductive cloning

Karyotyping

Question 4 2.5 / 2.5 points

Which of these is most likely to cause the development of a six-legged frog?

Question options:

Mutation of homeotic genes

Artificial selection

Dietary supplementation

Conversion of a proto-oncogene to an oncogene

Question 5 2.5 / 2.5 points

Which of the following turns off transcription by binding to the operator?

Question options:

RNA polymerase

Repressor

Promoter

Lactose

Question 6 2.5 / 2.5 points

The region of DNA where RNA synthesis begins is the:

Question options:

start codon.

promoter.

initiator.

processor.

Question 7 2.5 / 2.5 points

The absence of a terminator in transcription will result in:

Question options:

the creation of a virus.

a strand of mRNA that lacks its cap and tail.

the production of a longer RNA molecule.

the production of a shorter RNA molecule.

Question 8 2.5 / 2.5 points

Which of the following enzymes is responsible for RNA synthesis?

Question options:

RNase

RNA helicase

RNA ligase

RNA polymerase

Question 9 0 / 2.5 points

Reproductive cloning can:

Question options:

reacquire the genes it lost during the course of development.

come from an early stage of embryonic development.

be differentiated.

be implanted in the egg of an organism that is capable of regenerating lost body parts.

Question 10 2.5 / 2.5 points

A couple has two female children. What is the probability that their next child will be male?

Question options:

25%

50%

33%

67%

Question 11 2.5 / 2.5 points

Where is translation accomplished?

Question options:

Lysosomes

Smooth endoplasmic reticulum

Ribosomes

Nucleoli

Question 12 2.5 / 2.5 points

In eukaryotic cells, repressor proteins inhibit transcription by binding to:

Question options:

The post determine the sex of an individual are called: Question options: appeared first on superioressaypapers.

Describe your system and include dimensions

What did you do? Why did you do it? What did you find out?

I. Introduction and Statement of the Problem – Can the RK EOS recover data from a polar substance like water? Why would this be important

II. Experimental or Computational Methods – Describe your system and include dimensions. Include the equations that you will use and define all variables and units. If experimental, take a picture of your experimental set-up, download the image and paste it here. Provide titles, labels and or legends for all figures shown.

What are your computational or experimental procedures?

III. Results and Discussion – Include +- in all numbers measured or calculated. Cleary cite sources and clearly state any assumptions used. If computational, compare to experimental values. If experimental, compare to theory or computations.

IV. Conclusions – Be brief.

V. References – Cite any references here in alphabetical order (cite by author and year). Do not cite URL’s – use the scholarly web.

The post Describe your system and include dimensions appeared first on superioressaypapers.