Write a primary literature-based review-like synopsis of the current understanding of a specific aspect of cancer research of the student’s choosing.

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– Write a primary literature-based review-like synopsis of the current understanding of a specific aspect of cancer research of the student’s choosing. This paper must include a critical analysis of the gaps in knowledge in the chosen field, and a proposal of how the student would suggest addressing these gaps. Must include: title, abstract, introductions, subheadings, conclusion, and references.

 

Find two instrumental methods for the analysis of sulfate in water or a water extract of soil

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Occasionally labs get request for the measurement of sulfate ions in soils or water samples. Sulfate is generally not considered toxic, however in soils with high sulfate concentrations the sulfate can react with clay mineral causing mechanical swelling of the soil. This effect can severely damage roads and other structures. The phenomenon is often sulfate referred to as sulfate heave. Assignment: Find two instrumental (analytical) methods for the analysis of sulfate in water or a water extract of soil. One of the methods should be based on the use of an Atomic Absorption Spectrophotometer. The other method should be based on the use of a UV/Vis spectrophotometer (or colorimeter). Provide references for both methods. Write a short description of each method, their detection limits and applicable concentration ranges. In your opinion which method would be the easiest to implement with a large number of samples (50 to 100 samples)?

How to identify the longest continuous chain of carbon atoms(gives you the suffix)

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How to name organic molecules using a simple branched alkane before more complex molecules to explain for instructional video.. you consider explaining the following things:
1. How to identify the functional group(gives you the suffix)
2. How to identify the longest continuous chain of carbon atoms(gives you the suffix)
3. How to identity the substituents.
4.How to number the chain correctly.
5. How to combine the different parts into an IUPAC name

Explain the process of sublimation. Name one substance that sublimes at room temperature and pressure.

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• Solids, liquids, and gases are the three most commonly accepted phases of matter. Explain the properties of each phase, including their relative energy.

• Explain the differences between an ideal gas and a real gas.

• Explain the process of sublimation. Name one substance that sublimes at room temperature and pressure.

• The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many molecules are in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? Express your answer to the correct number of significant figures. (MM of Cu(OH)2 is 97.562 g/mol). Be sure to show all steps completed to arrive at the answer.

• The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL bottle of water? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.

• A manufacturing company is trying to produce a lightweight but strong cart for use by home gardeners. Explain which metal—titanium (Ti), iron (Fe), or zinc (Zn)—would be the best for this application and why?

• Combustion reactions are a notable source of carbon dioxide in the environment. Using the following balanced equation, how many grams of carbon dioxide are formed when 100.00 g of propane (C3H8) is burned? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.

• To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of the reaction are lead and sulfur trioxide (SO3). Write a balanced chemical equation for this process. How many grams of lead will be produced if 2.54 grams of PbS is burned with 1.88 g of O2? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer. (Hint: be sure to work the problem with both PbS and O2).

• Using the Ideal Gas Law, PV = nRT, where R = 0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the following reaction. The oxygen is collected at 2.22 atm and 25.44°C. Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.

• Ammonia (NH3) is an example of a Brønsted-Lowry Base.

• Define the Brønsted-Lowry acid-base theory.

• What’s the pH of a solution of ammonia that has a concentration of 0.335 M? The Kb of ammonia is 1.8 × 10–5.

• Electrochemistry is important in many aspects of daily life.

• Define voltaic cell.

• Fill in the blanks for the drawing of a voltaic cell that’s made with copper/copper (II) nitrate (E° = 0.34 V) and zinc/zinc (II) nitrate (E° = –0.76 V). Briefly explain the role of the salt bridge.

• Using the equation E°cell = E°cathode – E°anode, calculate the overall cell potential for the cell in step b. Be sure to show all steps completed to arrive at the answer.

a. _____________
b. _____________
c. _____________
d. _____________
e. _____________
f. _____________
g. _____________
h. _____________

• Compare and contrast an electrolytic cell with a voltaic cell. Provide one example where both are present in daily life.

For chemical drawings, you can use the Chemical Equation editor in the submission box for the assignment. You can also download a program called Marvin Sketch (https://chemaxon.com/products/marvin).

• Acid catalyzed dehydration-condensation reactions of carboxylic acids and alcohols produce chemicals called esters.

• Using carbon skeletal notation, write the dehydration-condensation reaction that occurs between ethanol and butanoic acid.

• What is the name of this ester?

• Respiration is a three-step process that breaks down glucose and produces ATP. Describe each of the three steps.

• The equation E = mc2 is one of the lasting symbols of science and nuclear chemistry in general.

• Explain what each term in this equation means and what energy is being calculated. What are the derived units for E?

• Compare a nuclear reaction, such as uranium’s alpha particle emission, with a nonnuclear reaction, such as the reaction of sodium with chlorine. What’s the fundamental difference between these two types of reactions?

Provide a graphical system development schedule for your selected system and identify the critical events in your system development schedule.

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Discuss your proposed project, and provide a brief synopsis of your system’s engineering management considerations and how you might satisfy the project schedule development, tracking, analysis, and critical event identification and tracking content areas of the SEP. Your submission may be subject to change as you develop your SEP, so consider this online discussion as an opportunity to explore your ideas with that of other students.

Post your initial response by the fourth day of the module week. Reply to one other student’s post; look first for a colleague who doesn’t have any replies.

Refer to the rubric for detailed grading information.

Assignment 2:

6.2System Schedule Methodology Summary

Systems Engineering Project

In this activity, you will provide a summary of the system schedule management strategy for your proposed SEP.

As an option for more insight into the topic, you may read/review the article Project Scheduling Under Uncertainty: Survey and Research Potentials (Links to an external site.)Links to an external site. by W. Herroelen and R. Leus (2005) from the European Journal of Operations Research.

Adhere to the following restrictions:

  • Adherence to standard APA formatting guidelines
  • Maximum length of four pages
  • Address the following considerations:
    • Describe the selected system schedule management approach you will use for your selected system in Module 1.
    • Why did you select this specific approach? Discuss one or two other methods that you also considered, and provide a reasoned discussion of why you did not select one of these competing methods.
    • Provide a graphical system development schedule for your selected system and identify the critical events in your system development schedule. You may use whatever system scheduling method you choose.

Save your assignment using a naming convention that includes your first and last name and the activity number (or description). Do not add punctuation or special characters.

 

What does the direction of liquid fall tell you about the polarity and intermolecular forces in the liquid in each case?

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Part 1: Solubility and Miscibility            

  1. a) Test the solubility of the following solids in solvents as follows:

Typical laboratory procedure:

To each test tube add a few granules of solid followed by solvent (1 mL). Stopper/bung and shake for 20-30 seconds (without inverting – keep the lid dry), then leave to settle.

-Potassium iodide in    i) water     ii) hexane

-iodine in                    i) water     ii) hexane     iii) dichloromethane

Video 1: Solubility of potassium iodide in water

Video 2: Solubility of potassium iodide in hexane video

Video 3 Solubility of iodine video

Water Hexane Chloroform
KI      
Observation:  

X
Conclusion:  

X
I2
Observation:
Conclusion:

 

Notes on observations, technique and lab practice for Iodine video:

Notes on observations, technique and lab practice for potassium iodide video:

  1. b) Test the following solvent mixtures for miscibilityby adding 1 mL of each solvent in a test tube, sealing the tube, shaking to mix (10 seconds), and leaving to settle (10 seconds).

Video for water with ethanol, hexane and 1-butanol

 

Water/Ethanol Water/Hexane Water/1-butanol
Observation:  

 

 
Conclusion:  

 

 

 

 

Notes on observations, technique and lab practice for water/ethanol experiment:

Notes on observations, technique and lab practice water/hexane experiment:

Notes on observations, technique and lab practice for water/1-butanol experiment:

Is there a phase boundary? Where layers form, state in the table which solvent forms the upper/lower layer.

How could you confirm your answer with KI or iodine?

Where does the colour in the video reside? What does this prove about the solvents’ relative density and polarity?

Part 2: Using a burette to see the effect of an electrical field on liquid streams

Typical laboratory procedure:

-Locate the four set up burettes (fume cupboard, far end of N219) containing water, ethanol, petroleum ether and formic acid.

-Statically charge up the polythene rod by rubbing it on a piece of cloth

-Open the burette tap to set up a slow but steady stream of falling liquid, collecting in the beaker.

-Move the rod to about 1-2 cm away from the falling liquid stream (no closer!).

-Note what happens (if anything) to the path of the stream.

-Repeat the experiment for the other liquids.

Watch the following video and detail your notes, observations and conclusions below:

Water and hexane with static charge video

Water hexane
Observation:  

 

 
Conclusion:  

 

 

 

 

Notes on video:

What does the direction of liquid fall tell you about the polarity and intermolecular forces in the liquid in each case?

Part 3: Reactivity of Functional Groups

  1. a) Bromine can be used to test for functional groups. Watch the following video of bromine being added to an alkane and an alkene. Watch the following video and answer the questions below:

Alkanes and alkenes with bromine video

What happens when bromine is added to the alkane?

What happens when bromine is added to the alkene?

Using hexene as an example, explain what happens when bromine is added to a sample of each – explain in words along with a drawn curly arrow mechanism.

  1. b) Tollens Test

The Tollens test, also known as the silver mirror test, can be used to distinguish between functional groups. Watch the following video and answer the questions below:

Tollens Test (Silver-Mirror Test)

Notes on video:

What is the Tollens test used for?

What compounds/solvent(s) does the Tollens test consist of?

Why are known positives/negatives used?

 

 

 

How vitamins and minerals/trace elements affect health/human body (CO 3)

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How vitamins and minerals/trace elements affect health/human body (CO 3)

Effects on the KC and Equilibrium when isotopes and ions are incorporated and removed from a chemical reaction

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Effects on the KC and Equilibrium when isotopes and ions are incorporated and removed from a chemical reaction

Describe and explain in detail at least three distinctly different uses for the element.

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Write a five-paragraph research paper on a chemical element (word limit 700-1000), focused on the following:

Locations/Origins : Explain where the element comes from originally (for

example: air, ground, made in lab, etc.). If it is found mostly in a particular

geographic region, you should include that information. Also, report on the

element’s history (when/where it was first discovered and by whom).

Uses : Describe and explain in detail at least three distinctly different uses for the

element.

Characteristics : Include the following: the element’s chemical symbol, atomic

number, atomic mass, physical properties, chemical properties, typical

compounds and isotopes, plus additional interesting or unusual characteristics.

• Your paper must include an introductory paragraph (with a strong thesis

statement) and a concluding paragraph. You must also have a sources page.

• You will be required to use at least three different sources.

• You must have a title page.

• Type your paper in Times New Roman, size 12 font, with single spacing.

• You must use your own words. “Cut and Paste” is plagiarism and is not

acceptable.

Based on this information, do you think that the mole should be considered a base unit in the SI system? Explain why or why not.

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In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations. However, a mole of something is just a particular quantity of it. It is not a unit of measure in the way that meters, seconds, and kilograms are. Calculations performed with the number of moles of a substance could also be performed with the number of particles of a substance. Based on this information, do you think that the mole should be considered a base unit in the SI system? Explain why or why not.