ch 8 note template (1)

Is it acceptable to recycle the containers of hazardous chemicals? Why or why not? Explain your answer within the context of chemical safety.

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.

Answer the following questions.  1. What are the benefits of green chemistry?2. How can non-beneficial chemical reactions be minimized and stopped?3. Discuss how chemical engineering applies the concept of limiting reagent and excess reagent in a reaction.

Which activities are likely to cause contamination of stock chemicals in the laboratory? pouring out chemicals from the stock container into another container returning unused stock chemicals to their original container at the end of an experiment swirling the container of stock chemicals to ensure that the contents are thoroughly mixed spilling some of the chemicals on the lab bench and then returning them to the original container inserting a dirty pipet into a container of stock chemicals

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Chemical Manufacturers Association (CMA) and four companies that manufacture chemicals challenged a test rule promulgated by the Environmental Protection Agency (EPA) under the Toxic Substances Control Act (TSCA). The plaintiffs asserted that the EPA must find that the existence of an unreasonable risk of injury to health is more probable than not before it may issue a test rule under the Act. In response, the EPA claimed that it may issue a test rule under the TSCA if the agency determines that there is a substantial probability of an unreasonable risk of injury to health. The test rule required toxicological testing to determine the health effects of the chemical, 2-ethylhexanoic acid, and imposed on exporters of this chemical a duty to file certain notices with the EPA. What standard should be applied? Why?

Every valentine’s day, CVS sells chocolate-covered cherries.  The chocolate-covered cherries are like a mini cake with a cherry inside.  The cake comprises a combination of sucrose (powder sugar), butter, cherry juice, and an enzyme (invertase).  Time (hours) Sucrose Concentration (g/cm3) 0 0.844 24 0.681 48 0.550 96 0.357 192 0.153     While stored at 5.00C, the sucrose hydrolyzes to produce glucose and fructose.  The mixture of the glucose and fructose is a liquid called invert sugar. Below you will find the concentration of sucrose in the cake as a function of time.  For the cherries to be edible, the 85% of the sucrose must be hydrolyzed.  Before you start to answer the question, create a data table that comprises sucrose concentration in units of moles per liter.    Write the chemical reaction that demonstrates the hydrolysis of sucrose.   With the data, determine how long it will take for 85% of the sucrose to be converted into…

Concentration (mg/ml) Time (min) 8.5 0.5 6.8 5.4 1.5 4.0 2 3.2 2.5 2.5 3 What will be the slope of the line using the given first and second values? What will be the y-intercept, still using the given first and second values? Completely state the equation of the line. nlcot olN5

Greenwashing is a major problem. Companies will say they are using practices that benefit the environment while really not taking any steps to do so. An example is Terracycle - a company that is supposedly able to recycle non-recyclable plastics and by-products - but which went over a year without collecting products from any of their customers. How can consumers navigate the labels to determine if products are actually sustainable.

The phrase "Benign by design" is often associated with green chemistry. In your own words, what does this phrase mean in relation to green chemistry?

Dissolution Distilled H20 Concentration 0.01 M HCI Concentration (mg/ml) Time Total amount A Total amount A (mg/ml) (mg) (mg) 5 0.16 0.1 10 0.24 0.18 15 0.35 0.25 20 0.48 0.34 25 0.58 0.4 30 0.67 0.5 1. Plot the given data on an ordinary paper and find the slope for each line then calculate the IDR constant for aspirin in the two dissolution media, water and HCI. NOTE: Slope of the calibration curve = 1.0 (mg/ml and saturation solubility of salicylic acid is equal to 2.0 gm/L.

Chemicals usually have both physical and health hazard. Identify the following if it b hazard. Health Hazard Mutagen Physical Hazard Barbeque have this benzo (a] pyrene that can cause cancer Physical Hazard Fire Toxins Physical Hazard Chemical burn Physical Hazard Explosives Large amount of smoke being inhaled Physical Hazard Spill of caustic soda in your skin Physical Hazard Health Hazerd Dlog

I need help in answering this. Thank you.

Carbon dioxide concentration (parts per million) Examine the graph and answer the following questions. Part A Atmospheric Carbon Dioxide What was the average rate of increase in carbon doxide concentration between 1900 and 19407 410 400 Express you answer in parts per million per year to two significant figures. 300 380 a ? 370 360 ppm/year 350 340 Submit Bequest Anawer 330 320 310 Part 8 Complete previous parts) 300 290 - 1860 1880 1900 1920 1940 1960 1980 2000 2020 Provide Feedback Next> Year

What is the purpose of Safety Data Sheets? Why are these important when handling common food service chemicals? What information/components are generally included? How do Safety Data Sheets vary?

What is Donnan's theory? What is its importance in biophysical chemistry?

What is the difference between single use, limited use and reusable chemical protective garments?

I don’t know how to do chemistry at all and I need help.

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

TRUE OR FALSE __________ 6. Glassware is clean when no water droplets cling to the inner wall of the vessel. __________ 7. When smelling the odor of a chemical substance, fan your hand over the substance toward your nose which should be centimeters away from the substance. __________ 8. An accident as simple as breaking a beaker containing distilled water in the sink does not need to be reported to the laboratory instructor. __________ 9. Students should turn off cell phones, iPads, and other electronic devices during the laboratory class. __________ 10. It is a good laboratory protocol to call other students’ attention when they do not practice good laboratory safety procedures.

Identify basic procedures for dealing with laboratory accidents.

5 please help! *urgent* write as many accurate and relevant statements about the picture below. please write more than 5 correct descriptions/statements. please be as descriptive as possible.

please i really need your help with this

Before slow cooking a meat (for example, in a crockpot/slow-cooker) you will often find instructions to sear the meat on high heat in an oiled skillet for a few minutes before transferring it to the crockpot. The searing is brief – not long enough to cook the meat thoroughly. Despite myth/legend, the searing will not “seal in the juices”. What is the searing for?

Explain the importance of knowing laboratory safety rules, guidelines, and waste management.

Write balanced equations for the reaction of Al(OH)g with stomach acid (HCI). Express your answer as a chemical equation. Identify all of the phases in your answer. | ΑΣφ ? Submit Request Answer Part B Write balanced equations for the reaction of Mg(OH), with stomach acid (HCI). Express your answer as a chemical equation. Identify all of the phases in your answer.

Refer to the table below. Answer the questions that follow. Express all your answers in four decimal places. Note: Do not round off the values of the slope and the y-intercept.Please keep your units consistent while calculating for the answers. Enclose in a box/highlight your final answers.  answer letter B

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter