safetycontract (1)

What safety rules did Andrew break?

Olympic athletes are tested to see whether or not they are using illegal performance-enhancing drugs. Suppose that urine samples are taken and analyzed, and the rate of false positive results is 1%. Suppose also that it is too expensive to refine the method to reduce the rate of false positive results.We certainly do not want to accuse innocent people of using illegal drugs. What can you do to reduce the rate of false accusations even though the test always has a false positive rate of 1%?

1.Explain the slogan about chemical safety " A spill, A slip, A hospital trip" 2.How do you apply 5s(sort, set in order, shine, standardize, sustain) to attain chemical safety at home and in school?. Enumerate

Concentrated sulphuric acid is used in this experiment to O help the crystal growth of acetylsalicylic acid speed up the reaction of aspirin synthesis increase the activation energy O avoid impurities getting trapped into the aspirin crystals P Type here to search

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.

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.

Anna is excited about conducting her lab today. She takes out her lab sheet and reads over the lab. She gathers all of the lab materials. She follows each lab procedure step-by-step until she has completed the procedure and recorded all of the data she collected. Afterward, Anna takes two of the substances and mixes them together to see what will happen. Which lab safety rule did Anna break? a. Follow all written and verbal instructions. If you do not understand something, ask the teacher first. b. Monitor experiments at all times. c. Wear goggles any time chemicals, heat, or glassware are used. d. Only perform experiments that your teacher tells you to perform. Never do anything that is not in the procedures.   PLEASE ANSWER THE QUESTION.

How a a cascade impactor separates particles ?

Discuss the similarities and differences between the following terms applied in a particular kind of forensic analysis.  Enzyme inhibition assay and enzyme-linked immunosorbent essay

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.

За. 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

Please help

Assessment Chemistry x Copy of spread of ista X E The Spread of Islam- x oncourseconnect.com/assessment/1651879/5287e2a3-0d0b-e2c0-c15c-3e68a37149b4 N hbox (004) aarolamex Clase D TPSS Bookmarks CHEMISTRY BENCHMARK TEST 01 CHEMSTRY1IARON JAMES ID 12390724) Aluminum (Al) reacts with chlorine (Cl,) gas to form aluminum chloride. Given the position of aluminum in the periodic table, what charge should the aluminum ion have in this compound? -5 +1 +3 + (P O A O B O D Save/Exit 1 4 5 6 8 9 10 US ASUS

All changes saved 17 Allyson and Cami add 25 mL of 3 M hydrochloric acid (HCI) to beakers containing 0 mL, 25 mL, 50 mL, and 75 mL of distilled water. The students then drop 5 cm of Magnesium (Mg) ribbon into each beaker and measure the time for the magnesium to completely react with the acid. The results are shown in the data table. W Y. 125 mL 125 mL 125 mL 125 mL 100 mL 100 mL 100 mL 100 mE 75 mL 75 mL 75-mE 75 mL 50 mL 50-mL 50 mL 50 mL 25-mL 25 mL 25 mL 25 mL Magnesium and HCI Reaction HCI Water Time Beaker (mL) (mL) (s) W 25 8. 25 25 16 25 50 23 Y 25 75 33 17 of 25 NEXT SAVE&EXIT PREVIOUS Which statement BEST explains the change in reaction time as the amount of water increases? US 7:18 Lit & 8.

This assignment is designed to help you learn how to determine total costs by combining direct and indirect costs for a particular department. In this GHA, you will be determining the total costs for three departments: (1) Physical Therapy (2) Occupational Therapy and (3) Speech Therapy. To determine the total costs, you will need to add the direct costs to the indirect costs using the template provided below. Please use the example provided in the assignment description if you find that you need some support understanding the required calculations. DIRECT COSTS The direct costs for each department are easily identifiable, because they are the costs that are directly attributable to the department. The direct costs are as follows: Physical Therapy (PT) Occupational Therapy (OT) Speech Therapy (ST) Total Direct Costs INDIRECT COSTS The indirect costs will need to be allocated to Physical Therapy (PT), Occupational Therapy (OT), and Speech Therapy (ST). The indirect costs in this…

You have accidentally broken a test tube and spilt a chemical on the table. Which of the following best explains what you should do? * Use water and paper towels to clean up the spill; place the broken test tube in the disposal container specified by the teacher for sharp objects. Throw the glass into the nearest trash bin and let the spill air-dry. Caution your lab partners to avoid the area while you inform the teacher of the small accident. Quickly dispose of the glass, wipe up the spill with the nearest cloth, and hope nobody notices.

For a field ecology project, you count the number of individuals of different ages found in a population during a single time period. There are 100 newborns, 40 1-year-olds, 15 2-year-olds, 5 3-year-olds, and 0 4-year-olds. Use these data to fill in the Nx, Sx, and Ix columns of a static life table.

4PH3 P4 + 6H₂ What is the rate of disappearance of PH3 from 0 to 75 seconds? Time [PH₂] [P4] [H₂] 0 2.00 0 0 75 1.50 ? ? 150 1.25 0.19 1.13 225 1.13 0.22 1.31 300 1.07 0.23 1.40 RatepH3 [?] x 10 M/s Coefficient (green) Exponent (yellow) Enter

[12!initial Two trials were completed in a kinetics experiment, resulting in the data collected below. Calculate the rate of each trial using the change in iodine concentration: rate Enter your answers in the boxes, rounded appropriately for significant figures. Use scientific notation, with E in the place of x10. For example, 1234 would be entered as 1.234E3 and 0.00123 would be entered as 1.23E-3. Do not use units. Trial Acetone, M 12, M H*1, M Time (sec) Rate 1 1.8 0.0025 0.33 136 2 1.8 0.0025 0.66 71 What are the units of rate? Use symbols only in your answer. What is the order of the reaction with respect to hydrogen ion? Report your answer to the tenths place. What is the order of the reaction with respect to hydrogen ion rounded to the nearest whole number?

Help me fill out the rest please.