Give an example of an organic chemistry laboratory process that involves medium to high severity and likelihood, and list precautions that can be taken to lower the risk.
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- Please answer questions 4a, 4b, and 4c. The questions are provided in the attached image. Thank you.You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.What section of Quality control is very prone to cross contamination ang particulate matter contamination?
- What is Donnan's theory? What is its importance in biophysical chemistry?Suspect #1: George Norman Suspect #2: Becky Baker George Norman recently Becky Baker is a world famous chef. She had just finished baking a cake at the time of the crime. The recipe called for baking soda. The formula for baking soda (sodium bicarbonate) is had an accident where he cut himself with a Alaia knife. He cleaned the wound with rubbing alcohol. The formula for rubbing alcohol Bak ing Seda NaHCOз. (isopropanol) is C3H80. Suspect # 3: Liz Lemon Suspect #4: Ben Linus Liz Lemon just had her nails Ben Linus had been walking done, and she still has traces of nail polish remover on her hands. Nail around in the rain for about an hour before the crime polish remover he was suspected contains acetone. Acetone of occurred. He The formula for Polish was dripping wet with water acetone is C3H60. renover at the time. The formula for water is H2o.Give examples of daily activities of a forensic chemistry
- Discuss the similarities and differences between the following terms applied in a particular kind of forensic analysis. Enzyme inhibition assay and enzyme-linked immunosorbent essayStep-by-step explanation pleaseWhat is the purpose of the implementation of GHS? Select the correct response: To eliminate the need to translate chemical labels from one language to another. To minimize the cost of putting up multiple chemical labels per economic or geographic bloc. To generate more revenue for chemical manufacturers and distributors. To establish a central authority that will dictate the full compliance of member states of the United Nations. To have a uniform chemical hazard communication system across a global platform.
- 12. Polychlorinated biphenyls (PCBS) arc organic mixtures of chlorinated compounds that were once widely used as dielectric and coolant fluids in electrical apparatus. They are now considered to be persistent organic pollutants * Figure 1 shows an example of PCB: 2,2',4,4-tetrachlorobiphenyl(PCB-47). CI CI Cl CI Figure 1 What is the m/z value of the most abundant molecular ion peak in a mass spectrum of PCB-47? [Chlorine exists as two isotopes, "Cl and "CI ; relative atomic mass C,12.0; H,1.0; CL 35.5] A. 290 В. 292 С. 294 D. 298Which of the following statements about the BOD test is FALSE? A BOD test is a simple and practical indicator of the total organic content that is available to organisms plus any chemicals that spontaneously react with oxygen. B BOD test measures the oxygen consumed by microorganisms as they break down organic material There is an indirect correlation between the BOD5 value and the level of organic pollutants. The standard test for BOD is the five-day (BOD5) test carried out in the dark at 20 °CЗа. Bromine and methanoic acid react in aqueous solution. Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g) The reaction was monitored by measuring the volume of carbon dioxide produced as time progressed. o 5 10 15 20 25 [Source: © International Baccalaureate Organization 2019] 30 20 40 60 80 100 120 140 160 Time / s [Source: © International Baccalaureate Organization 2019] Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working. 3b. Outline, with a reason, another property that could be monitored to measure the rate of this reaction. 3c. Describe one systematic error associated with the use of the gas syringe, and how the error affects the calculated rate. 3d. Identify one error associated with the use of an accurate stopwatch. Volume of carbon dioxide / cm T m mm mo