Experiment 2A

I Part 3 Discussion questions: Please answer in less than 2 paragraphs (20 points) 1. The FDA scientists have published 2 papers on the subject of sunscreen dermal absorption. What is different between the publications? The editorial page in the journal JAMA (Journal of American Medication Association) might help you answer this question.

Think about the situation where you are investigating the relationship of study time vs. exam grade.a. Which variable would be on the x-axis (and why)?b. Which variable would be on the y-axis (and why)?c. Would you expect the slope to be positive or negative (and Why)? 2) Contrast and compare interpolation with extrapolation. Which is “safer” to use and why?3) Look up how “the best fit straight line” is constructed. The term “Least squares” should be in your explanation.4) If I plot some data and end up with a r2 of (-) 0.99, is my plot useless? Explain.

Pre-Lab Questions Experiment 12 Food Chromatography: The Distance Our Food Travels Name: Section: Instructor: Date: Imagine you have a solution that is comprised solely of component A. You have another solution that is comprised solely of component B, and yet a third solution that is comprised solely of component C. Component A's retention factor is about 0.84, Component B's retention factor is about 0.21, and Component C's retention factor is 0.55 in the same solvent system. You then have a fourth solution that is composed of components A and C. 145 You spot each solution on a piece of chromatography paper and allow the solutions to separate. Sketch what you think your paper would look like below.

Please help

How long is a microcentury, if a lecture period (50.0 min) is close to 1.00 microcentury?

What are the advantages of a microscale lab?

Question:  Using a sample of aspirin for HPLC analysis. If the aspirin was contaminated (wet) with trace amounts of a solvent such as ethyl acetate, hexane, or water, would this contaminant be detected and appear as a peak in the HPLC chromatogram? Briefly explain based on the type of detector used in HPLC analysis and what type of compounds can be detected. My Answer: The HPLC analysis detects chromophores, compounds with multiple double bonds. Since water, ethyl acetate, and hexane all lack multiple pi bonds this will not be detected in the HPLC.  -Question for you, is this complete (and correct), and should I include anything about UV detection? Is UV detection used in HPLC? I thought it was only used on TLC to show compunds that arent visable.

What can labs do to reduce error in GC- ms??

Instructions You are required to produce a short lab report using the information given in the accompanying document, ‘Lab report assessment_student data’. This document introduces an experiment, and also provides a set of experimental data for this experiment. You are required to use this data to perform steps 8 and 9 of the procedure. This includes calculations of a particular value, and then comparison to the true value. Consider any experimental errors when comparing calculated values and true values. Your report should be between 300 and 500 words (including all table contents and titles of tables and graphs). Your lab report should consist of three sections only: • Experimental • Results and Discussion • Conclusion You do NOT need to include an introduction section. Your experimental section should be written in appropriate lab report format, (passive voice, 3 rd person, in paragraphs). Your results and discussion section should contain the data presented in table format, and…

There is one incorrect answer here. Can you help me figure out which one?

Using the data provided please help me answer this question.  Determine the concentration of the iron(Ill) salicylate in the unknown directly from to graph and from the best fit trend-line (least squares analysis) of the graph that yielded a straight line.

why is it importnant to write a lab report once the experiment is finished

Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 27.Quality control department maintain and store records that represent the history of batch from start to finish a. Quality Coordinating office b. Analytical Laboratory d. Material Inspection Section e. Biological Testing Laboratory C. Specification & Analyrtical Development section 28. Which of the following cannot be assay by direct titration with standard base? Citric acid in calamansi juice a. Magnesium hydroxide in Milk of Magnesia C. Acetic acid in vinegar b. d. Diluted phosphoric acid 29. This is used for quantitative preparation of a standard solution: a. Pipet C. Volumetric flask b. Graduated cylinder d. Buret

in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!!!!!!!

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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.

Styles Voice Text in Portuguese is not being checked. Do you (i) MISSING PROOFING TOOLS want to download proofing tools and future Sensitivity Editon Download updates? 一 4 7. 10 1 11 | 12 17. What is the main side effect of anti-epileptic drugs? a. Hypertension b. Drowsiness c. Tachycardia I. d. Insomnia e. Euphoria I believe these drugs are like the ones of the work- dihidropyridines-cont 18. What is metformin used for as first choice of treatment, and why? a. Type II diabetes, because it regulates blood glucose levels b. Hyperthyroidism, because it inhibits the formation of T3 an idirm hecause it doesn't interact with other drug 9.1 7. 8.

Using the lab instructions and data table with data, please help me complete part 1 and 2 of my lab worksheet

ed Test This test has a time limit of 1 hour.This test will save and submit automatically when th Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. tiple Attempts Not allowed. This test can only be taken once. ce Completion This test can be saved and resumed at any point until time has expired. The timer will emaining Time: 57 minutes, 15 seconds. uestion Completion Status: A Moving to another question will save this response. Question 4 The standard Gibb's Free Energy (AGO) = 18.38 kJ at 25C for the reaction HNO2 2 H+ + NO2-. What is the value of AG if {HNO2} = 0.75 M, {H+} = 0.13M and {NO2-} = 0.07M? %3D %3D %3D Is the reaction spontaneous under these conditions? Moving to another question will save this response.

Order: heparin sodium 20,000 units IV in 500 mL of 0.5 NS to infuse at 1,200 units/hour. What is the flow rate in mL/h? (Enter numeric answer rounded to the nearest whole number.)

Include all decimals #. Thank you