Primary literature

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.

Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.  Summative Assessment  Summative: Components of the Lab Report Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances. Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used. Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature. Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…

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.

The following volumes of 0.000300 M SCN are diluted to 15.00 mL. Determine the concentration of SCN in each sample after dilution. These values will be used during the experiment. To enter exponential values, use the format 1.0e-5. Sample 0.000300 M SCN (mL) [SCN'] (M) 1 1.50 3.50 7.00 4 10.00 3.

New employees at Avondale Industries’ unmanned systems production line in Denver, CO, participate in employee training under the direction of the training and development department, but the line managers conduct the actual training. During the last two trainings, the line managers cut the sessions short and explained that the employees would receive better training while working on the production line. The trainer responsible for the program understood the line managers’ viewpoint about developing skills used on the line but needed them to see that training should provide more than just developing those specific skills. Which of the follow statements best explains why training should provide a longer-term view than just teaching line workers the skills needed to perform satisfactorily in their current jobs?     Giving line workers expanded training helps them understand more than specific skills; it also helps them become more confident contributors.   Training with a…

The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose.  One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at  hand.  For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used?  In the iodometry lab, the produced iodine was titrated with standard thiosulfate solution.  Give  the name of the      container for the newly generated  iodine.         ________________   Ready the unknown sample that was just taken from the oven for subsequent weighing.             _______________   Measure out 3 mL of concentrated NaOH solution for the preparation of approximately 0.1 M solution. ______

8 - 14 please

26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50

Hello, I hope you are doing well on this fine day. For the following quetion please read carefully the question and instruction. PLEASE ANSWER QUESTION IN 20 MINTUES NOT MORE PLEASE AND THANK YOU. If you do answer the question correctly and post it in the next 20 minutes, NO NEED TO SHOW ALL THE WORK, I JUST WOULD LIKE THE CORRECT ANSWER AS SOON AS POSSIBLE. I will write a wonderful and generous feedback/review/rating about you. What is the total amount (in mol) of ions in solution when 34.7 g of the ionic solid Ba(OH)2·8H2O completely dissolves in water? The molar mass of Ba(OH)2·8H2O is 315.46 g/mol.

1. Several students performed this experiment without paying adequate attention to the details of the procedure. Briefly explain what effect each of the following procedural hanges would have on the size of the volume- to- temperature ratio calculated by the students. (a) One student failed to replenish the boiling water in the boiling- water bath as the flask was being heated. At the end of the 6 min of heating, the boiling water in the bath was only in contact with the lower portion of the flask. (b) Following the proper heating of the flask in the boiling water, a student removed the flask from the boiling- water bath but only partially immersed the flask in the ice-water bath during the cooling period. (c) A student neglected to close the pinch clamp before removing the flask from the boiling water bath and immersing it in the ice-water bath. (d) One student neglected to measure the volume of the flask before leaving the laboratory. Because the procedure called for a 125-mL…

I need help understanding how to do this, can you please show me how you get the CFU/mL

In analytical chemistry, what is a standard method? Include any sources you used to answer this question. Give an example of a standard method, and the reference for it. 2.

A sample was placed on a chromatography column. Methylene chloride was used as the eluting solvent. No separation of the components in the sample was observed. What must have been happening during this experiment? How would you change the experiment to overcome this problem?

2 W S Type your answer to the following: Consider the steps the student took in the following scenario. Then describe anything the student did wrong and how it would have affected the student results (too high, low, or unchanged) and why. X A student forgot to weigh the filter paper prior to filtering the salt from the sand. To make up for this, the student weighed a different filter paper from the box and used that mass in the calculations. Edit View Insert Format Tools Table 12pt Paragraph # 3 80 F3 E D $ 4 C 888 R LL F BI U % 5 V F5 T G MacBook Air 6 F6 Y B T² & 7 H F7 A U N * 00 8 J 1 ( 9 M K O F10 L X P

All boxes please. Answer choices: analytical technique or purpose

PAPER CROMATOGRAPHY • Define chromatography • Demonstrate an understanding of the process of chromatography • Describe the steps involved in a chromatography investigation Explanation Coloured inks are often made up of several different inks. Each colour of ink will get carried a different distance by the water, allowing you to see all of the different inks. Try this with different colours to see what actually goes into a colour. This technique is called chromatography and can be used in chemistry to find out what is in an unknown mixture. II. Materials .Felt tip pens (non-washable) . Kitchen roll .A bowl or cup . Water • Scissors III. Health and safety • Make sure that you thoroughly clean any equipment after the experiment before using for food IV. Procedure Method 1 1. Take a sheet of kitchen roll and draw a simple picture with a non-washable felt tip pen. 2. Place the sheet over an empty bowl. This is to keep the paper from getting too wet. 3. Carefully add a few drops of water…

Write dimly, brightly, not at all to the intensity and classify what kind the chemical is depending on its electrical conductivity

This question must be finished in your tutorial and this Word document containing your answers submitted within 120 minutes of the end of your tutorial. You will receive feedback from your tutor in a few weeks. The answers will be available where you obtained this. There are no marks for this exercise but it counts towards participation. Draw your answers on a separate piece of paper, take an image and insert the image(s) into this Word document at the end. (a) Re-draw the following molecule with the CH2CH2CH3 group on the ladder 1. H H2 ОН H3C H2 CH2 H;C (b) Is the molecule in part (a) the same molecule or the enantiomer of the following. Circle your answer Explain your answer CH3 SAME MOLECULE H2C H2 -CH3 ENANTIOMER H2 ОН 3. What is the configuration (R or S) of the chiral carbon in this molecule. Label the ranking of each of the groups on the chiral carbon from 1 (highest) to 4 (lowest) Draw the representation of this molecule with the lowest ranked group (4) on the ladder and…

The experiment involves diluting a 16% sugar solution, prepared by dissolving 16 g of sugar in 100 mL  water.  Three different solutions are prepared by mixing the 16% sugar solution with various volumes of water.Make appropriate choices from the dropdowns.  Work from left to right.  Each answer can be calculated from numbers to the left of it in the row. The objective is to calculate the number in the right-hand most column in each row (% sugar in the solution). 16% sugar solution taken / mL water added/ mL diluted solution / mL Dilutionfactor % sugarin diluted solution 25 25                             [ Select right answer]                          ["50", "25", "100", "150"]                                        [ Select right answer]                          ["1", "0.5", "2"]                                        [ Select right answer]                          ["8", "50", "12.5", "25"]            25 8.3                             [ Select right answer]…

Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portions of the soil extract sample was transferred to four 25-mL volumetric flasks. To each flask, increment volumes of a 1.00 x10-3M nitrite was added according to the table below. A colorimetric reagent was added to each flask to convert the nitrite into a colored product, and finally diluted to volume. What is the concentration of the nitrite in the soil extract based on the absorbance data below (with blank correction included)? Vol. of standard nitrite added, ml Absorbance 5.00 0.079 10.00 0.161 15.00 0.236 20.00 0.318 25.00 0.403

What is the difference between a decigram balance and an analytical balance?