Long Quiz 002 - (10)

20,18,2,4,15,15,10 Using these data, construct a 80% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal.  Construct the 80% confidence interval. Round your answer to one decimal place.

sub= 18 help

Categorize each as a determinate or an indeterminate error and further classify determinate errors as instrumental, method or personal. a) An unknown sample being weighed is hygroscopic. b) One component of a mixture being analyzed quantitatively by GC reacts with the column packing. c) A radioactive sample being counted repeatedly without any change in condition yields a slightly different count at each trial. d) The tip of the pipet used in the analysis is broken. e) In measuring the same peak heights of a chromatogram, two technician each report different heights.

In order to calibrate a pipet, you obtain the following data:   # of drops mL Trial 1 30 0.72 Trial 2 30 0.77 Trial 3 30 0.82 What volume in mL does your pipet deliver per drop?

Which of the following statements concerning calibration curves are true? 1. A plot of signal versus analyte amount or concentration  2. Measure the response of an instrument by first measuring the response from a standard  3. Used to calibrate a measurement over an extended range.   a. 1 only b. 1 an 2 only c. 1 and 3 only d. 2 and 3 only e. 1, 2, and 3

Sample Name: Test2 Acq. Operator : SYSTEM Sample Operator: SYSTEM Acq. Instrument : 6890N_GC-FID Injection Date Acq. Method Last changed : 11/11/2024 2:21:09 PM Location : 1 Inj Volume Manually : C:\CHEM32\1\METHODS \DEHYD351L.M : 11/8/2024 3:26:55 PM by SYSTEM Analysis Method : C:\CHEM32\1\METHODS\DEF_GC.M 11/12/2024 10:20:57 AM by SYSTEM FID1A, (CHEM351LITest2 2024-11-11 14-21-09.D) Last changed PA 1750 1500 1250 1000 750 500 250 0 1.226 1.338 1.393 1.445 1.513 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 min Area Percent Report Sorted By Multiplier : Signal 1.0000 Dilution 1.0000 Use Multiplier & Dilution Factor with ISTDS # [min] Signal 1: FID1 A, Peak RetTime Type Width ----|-------|----|-------|-------| Area [min] [PA*s] Height [PA] Area % |--------| 1 1.226 BB 0.0138 2.49083 2.96068 0.12408 2 1.338 BB 0.0173 6.06945 5.33509 0.30236 3 1.393 BV 0.0175 180.39203 156.04135 8.98645 4 1.445 VB 0.0147 17.87214 5 1.513 BB S 19.50680 0.89032. 0.0151 1800.55408 1899.02905 89.69679 Totals: 2007.37852…

I need help finding the %Composition for %cychohexane and %toluene. The formula (area of peak/total area) * 100%

analyte concentration(C)(mg/ml) injection volume (ul) elution time (time) peak DAD signal(mAU) caffeine 1 1 4.67 302.85 aspartame 5 1 7.53 15.83 benzoic acid 1 1 8.14 89.98 saccharin 1 1 1.91 84.86 mixture(add everything above with 1:1:1:1 ratio)   1 4.47 69.58 How to get the concentration of the mixture in this case?

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

Can you please fill the rest of tghe data based on the on inforamtion you have and  answer  Average concentratuon of NaOH  Standard deviation of concentration

Include all decimals #. Thank you

I need help finding the %Composition for %cychohexane and %toluene. The formula (area of peak/total area) * 100%

Sample IdentificationCodeConcentration of M%TA=2-log(%T)Q50004.00 x 10-417.90.75Q50013.20 x 10-425.00.6Q50022.40 x 10-435.70.46Q50031.60 x 10-450.20.3Q50048.000 x 10-570.80.15SampleIdentificationCode%TA=2-log(%T)AMQ0210150143.70.359518560.360.000192Q0210150244.10.355561410.360.00018Q0210150343.80.358525890.360.00017Q0210150444.10.355561410.360.00018Q0210150543.80.358525890.360.00017What was their percent error?43%Does Batch 021015 meet legal requirements?No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)Well #DropsBluedye1234567891012345678910Drops 9Distilled water876543210Concne 0.26tration0.52Test Tube #0.781.041.3Solutions3Concentration (M)2.082.32.6Concentration (ppm)1:1 dilution11.82Starting Dilution21.562:1 dilution0A.Zero standard0Was your calibration curve as linear as you expected?B.Did you experience any “drift” of the resistance readings?C.What is the equation of your best-fit line?D.What commercial drink did you analyze?E.Assuming…