bsmk2020

I mole of material X:C8H12 reacts with 2 moles of hydrogen in the presence of platinum. Material X reacts with kmno4 at room temp: eliminating the purple color and obtaining organic substance Y. The oZOnolysis of X gives W: pentane-2,4-dione and Z: C3H4O2. Material X reacts with water in an acidic environment to give 2 organic products U and V. Follow the DHI concept, predict the structure of U,V,X,Y AND Z

If you were to run the experiment without using any celite 545, what would happen to the purity of your sample and why? Be specific.

Why is Celite 545 labeled as 545? What makes it special?

If you were to use THF, or tetrahydrofuran instead of dicholormethane for this experiment, could you still successfully extract your caffeine? Why or why not? (Consider what is necessary for an extraction to work) Why is dichloromethane different from THF

Only answer what is above. The experiment is written below.

My Post Lab questions are asking me this about my caffeine experiment. "You perform a TLC experiment on a product that you obtained in the lab. When you put it under the UV lamp, you see only one spot. Upon further analysis, however, you realize that there are actually two compounds in the sample. Give two reasons why this could happen, and then suggest how you could modify the experiment to overcome each one"

I do not know why this could happen or how to determine this.

Thank you!

Answer the following question:

1. As a scientist working in a government lab, you have been given full control over the production of a new compound. The compound was isolated from the horse chestnut tree, a tree which only grows throughout 20% of the world and reaches maturity in 75-80 years. It was found that only the flowers contain the compound of interest (shown to the right). Choose whether you would extract from the natural source or chemically synthesize the compound. Explain and justify three reasons that support the choice you made and one reason, that is different than anything you mentioned, why your choice might not be the best – detail required in all answers(9 marks)

Answer the following question:

1. Name and describe, in detail, two reasons why an LD50 values isn’t necessarily useful for someone to know. Pick ONE of the two reasons you described and explain an experiment you could perform to try and help make it more useful to humans. You can have an unlimited budget and access to anything you need that exists currently however you are not allowed to experiment on humans. (7 marks)

Question 3:

Please read the entire scenario and ALL questions below before you start to answer so you know the whole scope of the questions you’re being asked.

 Scenario:

You are the lead of a forensic toxicology team and calling all the shots. You have just been given a new case, where you must try and determine if John Doe, the person you are doing an autopsy on, was the victim of foul play – a suspected poisoning.

 John Doe arrived at the emergency room of a hospital one day ago alive but unconscious. The following samples were collected upon admission:

• Blood (A).

• Urine (B).

• Hair (C).

After being admitted for one day (24 hours), John Doe died with no cause of death reported. John Doe’s body arrives at your facility for autopsy along with the samples A, B, and C. You further collect the following samples:

• Liver (any part) (D).

• Stomach contents (E).

• Lungs (F).

• Vitreous humor (G).

• Hair (H).

• Blood (I).

• Urine (J).

After reading the scenario answer the following questions:

1. You only have enough time/money to process and analyze 4 of the samples (A-J). Indicate which 4 samples you would select and explain why you chose those samples (each sample has a letter associated with it (A-J); use this letter when answering the question). In your explanation you should discuss why each sample individually was chosen and any benefits there might be from the samples complementing each other. Also include in your answer the key factor that must be considered with respect to all samples and explain how you accommodated this with you sample choices. (5 marks)

2. Once you have chosen your samples, you will need to perform some form of chromatography on each one before you can start to analyze them for any poison. Indicate which method of chromatography you would choose for each sample. You can use more than one method of chromatography on a single sample or use the same method on all samples – as long as you explain how that method of chromatography works and why it’s appropriate for each sample. As part of your answer, discuss if each sample would need pre-treatment before being subjected to chromatography and what the pre-treatment would be. (6 marks)

3. Now that you have prepared your samples you must visualize and quantify your results using mass spectrometry. Select an ionization method for each sample that you prepared in question 2 above, describe how it works, and why it is ideal for that specific sample. (6 marks)

4. Describe what you need to do in question 3 above in order to be able to quantify your sample? (2 marks)

5. What if you were presenting your mass spectrometry results in court and had a peak at an m/z of 542.3 and you stated in your findings that this corresponds to a unique fentanyl analogue, which killed John Doe. Describe what you would need to do to provide this proof and why the proof is needed? (4 marks)

Provide names of primary peer-reviewed articles that discuss the various genetic factors that can influence the growth and development of plants, such as gene expression, epigenetics, and epigenetic inheritance

What is the plot in the short story “gray matter” by Stephen king?

In this week's readings, you were asked to watch Black Mirror episode, San Junipero. Based on this week's lecture, given by Angie Fazekas, would you say this episode falls into the "bury your gays" trope? Or does it resist it? Explain why or why not.