- Ammonia is a colorless gas that is easily recognized because of its pungent odor. Ammonia is often encountered as anhydrous ammonia. Describe anhydrous ammonia and at least three of its commercial uses. When there is a release, explain why emergency responders should not apply water directly to the release of aqueous ammonia. Provide its chemical reaction with water.
Your response must be at least 75 words in length. - The 8-hour time-weighted average limit set by the Occupational Safety and Health Administration (OSHA) for carbon monoxide (CO) is 50 ppm. The OSHA regulation at 29 C.F.R. §1910.1000(d) requires employers to determine the cumulative exposure of workers to certain gases over an 8-hour work shift using the formula below.
Formula to determine cumulative exposure of workers to certain gases
Where:
E = equivalent exposure for the work shift
C = concentration during any period of time in which the concentration remains constant
T = duration of time in hours of the exposure
The regulation further stipulates that no employee can be further exposed to the gas when the value of E exceeds the 8-hour time-weighted average limit set for the given substance. Using the formula above, determine if the employer complied with this regulation if a worker is exposed to CO concentrations throughout the workday as follows: 45 ppm for 3.25 hours; 75 ppm for 2.5 hours; 50 ppm for 1.5 hours and 60 ppm for 45 minutes. Explain CO poisoning and the interaction of CO with hemoglobin.
Please show your exposure calculation, not just your calculated answer. Your response must be at least 75 words in length. - In the biological treatment of wastewater, microorganisms break down the organic matter, such as food, oil, and human waste, in the wastewater and forms CO2 and microbial biomass. When firefighters combat a fire near a wastewater treatment plant where agricultural pesticides are involved, explain why the wastewater treatment operators are notified. Also, explain why there are fewer inorganic pesticides that are encountered today.
Your response must be at least 75 words in length.
Category: Chemistry
A PowerPoint about an amino acid of your choosing.
Create a PowerPoint about an amino acid of your choosing. More than one person can choose the same amino acid. Here’s what I need from you: Name of the amino acid Structure. What type is it? Polar? Nonpolar? Single letter symbol3 letter symbol. Who discovered it. Where it was discovered. What is its biological function. Is it commercially available and if so, for what purpose. Any special features of the amino acid that makes it unique compared to the others. Citations are required with a reference slide at the end
Elemental Brochure
Create a brochure! A brochure is often a short informational or persuasive publication about a product. Your product is your choice of one of the elements from the Periodic Table. Using Lucidpress Brochure Maker, you will create and design your own unique brochure advertising your element. Include as many images as you would like. The required information on you brochure will include:
· Name of the element
· Atomic number
· Atomic mass
· Number of protons, neutrons, and electrons
· When was it discovered
· Who discovered it
· How it was I discovered
· Where did the element’s name come from
· It’s melting and boiling point
· State at room temperature (solid, liquid or gas)
· One way you could cause a chemical change
· One way you could cause a physical change
· Two current uses for this element
· Two possible ways to use this element in the future
Benzodiazepine toxicity
What are the signs of benzodiazepine toxicity? How is it treated?
How do local anesthetics work? Why are vasoconstrictors often used with local anesthetics?
Why are local anesthetics with epinephrine not used near toes, fingers, noses, ears, or penis? Describe balanced anesthesia.
What is the mechanism of action of inhaled anesthetics?
Describe minimum alveolar concentration.
How might nurses and nursing organizations improve policies to encourage
Examine how might nurses and nursing organizations improve policies to encourage the judicious use of antibiotics in humans? Identify the correlation between global disease surveillance and domestic disease surveillance, and the significant role the family nurse practitioner plays.
Chemistry questions
1. List any pure elements that are found in the food. Check this against a periodic table to ensure that you are correctly identifying these.
2. Identify any ionic compounds that are found in the food. Remember that these will typically be salts of some kind, but may not be immediately obvious from the name. As an example, remember that monosodium glutamate (NaC5H8O4N) is an example of an ionic compound from your module. (If you have started Activity 1, this will help you with this).
3. Identify any vitamins that are present in the food. Provide your classmates with the chemical formula for those vitamins (or even the structure if you find it online). Do those vitamins have names other than just the letter “Vitamin __”?
4. Were there any ingredients that you couldn’t identify or recognize? Do a quick Internet search and provide your classmates with some information about that ingredient. Be sure to cite your source!
In your responses to your classmates, pick ONE of the above questions that he or she didn’t answer in the original post and answer it for him/her.
Sampling
As you might expect, it is impossible to study the entirety of any particular population. However, researchers can collect data for their studies from a sample of that population. The characteristics of the sample are important for generalizability—the extent to which research findings can be applicable to a larger population. To support generalizability, the sample should be as much like the population as possible and a large enough size to mitigate the chance of differences.
This week, you explore sampling and select a sampling technique for your research. Additionally, you begin to compile information and plans for your proposed study into a formal research proposal. Part 1 is due this week, and you will submit Part 2 next week.
Learning Objectives
Students will:
• Identify the population and sample for a proposed research study
• Analyze the needs of the research study to determine an appropriate sampling method
• Analyze ethical and cultural considerations related to research study population
Chemistry
Give the following reaction:
FeO(s) + CO(g) → Fe(s) + CO2(g)
a. How many moles of CO are needed to react with 54.2 g of FeO
b. What is the mass of Fe solid produced by 54.2 g of FeO
2. Give the following reaction:
ammonium nitrate → dinitrogen monoxide + water
a. Write a complete balanced chemical equation.
b. Calculate the number of molecules of water produced by 11.2g of ammonium nitrate
3. When potassium chlorate is heated, it decomposes to potassium chloride and oxygen gas.
Write a balanced chemical equation. Calculate the mass of oxygen gas produced by 0.25 kg of potassium
chlorate.
4. Given the following balance chemical equation:
Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
21.6g of Fe2O3 is placed in this reaction
a) How many grams of H2SO4 required to react fully with 21.6g of Fe2O3?
b) How many mole of Fe2(SO4)3 will be produced in this reaction, given 21.6g of Fe2O3?
c) How many molecules of Fe2(SO4)3 will be produced in this reaction?
(Hint: use answer from b)
5. Given the following balance chemical equation:
2 AgNO3 (aq) + CaCl2 (aq) → Ca(NO3)2 (aq) + 2 AgCl (s)
15.0 g of AgNO3 and 15.0 g of CaCl2 are placed in this reaction.
a) Which one is the limiting reactant? Which one is the excess reactant? Show calculation on the mass of
product produced to support your answer.
b) How many grams of AgCl (s) can be produced in this reaction?
c) If at the end of the experiment, you collected 10.7g of AgCl (s), what is the percent yield?
d) How many grams of the excess reactant is left over?
Why when salt dissolves the ions separate
Discuss the reason why salt, when it dissolves the ions separate. Why does the water molecules cluster around each of them in hydration shells? Explain how the shell of these are different ( Ion-dipole forces and hydrogen bonding occurs). Give an example of a slat that does this.
The future of hydraulics in aviation
What is the future of hydraulics in aviation?