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The concentration of gadolinium was measured in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.411 ppm, 1.411 ppm, 1.401 ppm, 1.409 ppm, 1.979 ppm, 1.408 ppm, 1.419 ppm, 1.402 ppm. Use the Grubbs test to determine if one of these values is an outlier. What is the value of ?cal?

1) In lab you are given 4 bottles, each containing about 5 grams of a white substance. Near the bottles are four labels indicating each bottle contains a high purity substance. Assume these labels belong to the bottles and that each bottle contains a single substance.   The four bottles contain glucose (C6H12O6), sodium chloride (NaCl), aluminum oxide (Al2O3), and zinc sulfate (ZnSO4).   Using your knowledge of solubility rules and electrolytic behavior, describe tests that you could conduct to determine which label belongs to which bottle. For these tests you may only use DI water, an aqueous solution of barium nitrate, and a conductivity tester to identify the substance in each of the bottles. Give the results you would expect for each test.

Please don't copy I am completing an online lab so I will try to provide the needed information to solve. Please let me know if any information is missing. We started with 20 mL 1 M acetic acid ~ 0.020 L acetic acid in a flask. (Ka acetic acid = 1.8x10^-5; pKa = 4.7) (Kb ammonia = 1.8x10^-5; pKb = 4.7; Ka = 5.56x10^-10; pKa = 9.25) We titrated with 1 M Ammonia have to calculate the pH mathematically at different amounts of Ammonia added. Our Ammonia amounts are 8 mL, 16 mL, 20 mL, and 22 mL. We then have to find the percent difference of the online labs pH calculations. Online Lab's Values: 8 mL Ammonia - pH of 4.58 16 mL Ammonia - pH of 5.36 20 mL Ammonia - pH of 6.99 (equivalence point in the lab) 22 mL Ammonia - pH of 8.24 I would greatly appreciate if you could show for all 4 of the amounts of Ammonia added, and show how you did them. Thank you! Will gladly upvote if work is shown!

If 12 ppm of alum dose is required for the treatment of water, find the quantity of alum for the treatment of 10 million liter of water.

How much protein do you need to add to the 800 µL buffer in the first microcentrifuge tube to make a 1:5 dilution? a) 500 µL b) 100 pl c) 100 mL d) 200 uL

You are creating a standard curve for a protein experiment. You have to stock solution of BS a and would like to obtain dilutions. Explain how you would create a 1:1000 dilution of your protein stock solution.

between 1960 and 2020 the concentration of atmospheric CO2 has increased by approximately?   Group of answer choices 100 ppm 320 ppm 400 ppm 420 ppm

= O ORGANIC FUNCTIONAL GROUPS Naming and drawing unsubstituted amides Draw the skeletal ("line") structure of N,N-dimethylethanamide. Click and drag to start drawing a structure. C™ X с S E 1/5 Kir

Sea X Assignments: ANATO X Gi 0220907135028396%20(1).pdf 2 CD Page view Human Anatomy X A Read aloud *20220907135028396 X TAdd text Draw 4 You prepare four solutions: Solution 1: Reactants + enzyme at #0 (about 100°F) and pH 7 Chemistry Check your recall lab. x V Highlight UNIT 2 65 3 Decompression sickness (also known as the bends) is a condition that affects divers and others operating under pressurized conditions. It occurs when gases such as nitrogen (N₂) come out of solution in the blood. This can lead to symptoms including joint pain, shortness of breath, and paralysis. Severe cases may result in death. a What type of molecule (ionic, polar covalent, nonpolar covalent) is nitrogen gas? b The liquid medium of blood is water. What type of compound (ionic, polar covalent, nonpolar covalent) is water? c What happens when molecules such as nitrogen gas mix with water? How does this explain the problems we see with decompression sickness?

5. Indigo is a blue dye: H H H H. =C 'N. H H H H H a) Draw the line structure for indigo. b) Place an asterisk next to any chiral carbon atoms in your structure (if there are any). Explain your choice in 1-2 sentences. c) Label all of the functional groups in your indigo molecule. d) If you were trying to use titration to quantify the amount of indigo in a sample, would you use HCl or NaOH as your titrant? Explain your answer in 1-2 sentences. e) Roughly sketch the titration curve that would result from the analysis in part d. Don't forget to label your axes and any important points on the curve.

1 mol Ca2+ 1 mol EDTA mol Ca2+ mol EDTA 1 = L EDTA x L 0.010 L water 33 Using the following equation, determine the average water hardness of your water. Record the hardness (ppm) in Data Table 2. Note: PPM is equivalent to mg/L for dilute solutions. 1 mol CACO3 1 mol Ca2+ 100.06 g CaCO3 1 mol CaCO3 mol Ca2+ 1000 mg Ppm CaCO, = 1L 1g 囲Data Experiment 1 E Data Table 1 E Data Table 2 Exercise 1 Data Table 2: Water Hardness Average Volume of EDTA Used (mL) Concentration Ca2+ lons Per Liter of Water (mol/L) Water Hardness (ppm CaCO3) .23

Please help me calculate this: I have a protein sample that has the concentration of 0.30835 µg/ml. I need a target protein that is 10 µg with a final volume of 30 µl. I am instructed to dilute as a 1/10 or 1/20; my volume of my protein cannot exceed 30 µl but cannot be less that 1.0 µl.

Search for Life Transfer Task 2 - Salt Substitute The American Heart Association says that at greater risk for high blood pressure as a result of eating salt. According to their website, "as little as one extra gram (half a teaspoon) of table salt could raise blood pressure as much as 5 mm Hg" compared to people who do not have this gene (heart.org, 2021). Table salt is made from Na & Cl ions, and there may be substitutes for it to be used in cooking that do not contain sodium. Sodium (Na) is the damaging part of table salt. Americans may be Nu Sait TSUESTTUTE Answer the prompts below to address the following question: What could be a substitute for sodium in table salt? 1. Which of the following questions could help you determine which element could be used as a substitute for sodium in table salt? (choose all that apply A. Do some elements have the same number of valence electrons as sodium? B. Are some elements more common on Earth than sodium? C. Do some elements combine to form…

Graph data with Concentration on the x-axis and Absorbance on the y-axis. Find the line of best fit for your data points. Record the respective formula in y=mx+b.

Answer question 1 please

Fill in the table

I need answers for # 2-9 on this worksheet

You are given a protein solution with a concentration of 0.15 mg/ml. If the molecular weight of the protein is 22,000 Da, express its initial concentration in moles/liter, μmoles/ml, and μmoles/μl, respectively. If we want 20 μmoles of proteins for a reaction, what volume do we need to prepare?

Concentration of Reagents (NH4)2S2O8 KI Na2S2O3 0.25 M 0.22 M 0.19 M Volumes of Solutions S₂082 (mL) Starch soln (mL) KNO3 (mL) EDTA soln (mL) KI (mL) S₂O32- (mL) x 5 9.7 0.9 26.4 0.5 9.9 1.1 Using the above data determine the concentration of I at the moment the reaction begins. HINT: This is a mixing problem. Determine the total number of moles of I and divide this amount by the total volume (in L). Be careful... If you go back and try this exercise again the values will change. Read the question carefully! Answer:

5. You are making ampicillin plates. Before pouring the plates, you add 2 mL of 10 mg/mL to the 400-ml bottle of LB agar that you use to pour the plates. What is the final concentration of the ampicillin in the plates? Express your answer as ug/mL. Show your work.

Tom, an analytical chemist, bought a bag of decaffeinated coffee from a grocery store. However,Tom suspected that he might have received regular coffee and therefore decided to analyze hiscoffee for caffeine. In the lab, he took 0.5 mL of the brewed coffee and diluted it in water tomake a 100.0 mL solution. He performed four analyses and found the concentrations to be 4.69,3.99, 4.12, and 4.50 mg/L, respectively. (Assume the density of all solutions is 1.000 g/mL,1oz= 28.35 mL).(a) Report the concentration (in mg/L) of caffeine in the brewed coffee using the format asaverage ± standard deviation. (Note this is not the concentration in the diluted solution.)(b) Look up the caffeine content of regular vs. decaffeinated coffee. Do you think that Tom wasgiven the wrong type of coffee?(c) Caffeine intake of 300 mg per day reportedly has no adverse effects in the vast majority ofthe adult population. If Tom drinks 3 cups (8 oz/cup) of this coffee daily, is his intake withinthis known safe…