Normalized Intensity 0.95 0.90 2л 6' 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 168 160 152 144 136 128 120 112 104 96 J 88 Chemical Shift (ppm) 8 сосе 80 72 64 56 99 48 40 32 24 16
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- In the technique of high performance liquid chromatography (HPLC) the peak area response for a particular analyte is directly proportional to concentration Analgesic tablets typically consist of aspirin and caffeine as the active ingredients, the remainder made up of inert binding material. The concentrations of aspirin and caffeine may be routinely monitored using HPLC, whereby the peak areas obtained from a solution of the tablet are compared with those obtained from standard solutions of the analytes. In an analysis to determine the concentration of caffeine in such a tablet, the following data were recorded: Solutions Analysed: Tablet Sample: Mass of tablet (dissolved in 250 cm methano): 0.523 g Caffeine Standard: Mass of caffeine (diessolved in 500 cm methanol) 0.105 g HPLC results: Solution Peak Area (catfeine) 1. Tablet Sample 325 2. Caffeine Std. 865 The concentration of caffeine in the tablet (expressed as a mass (w/wl percentage) was Oa 1.89 Ob 13.4 O 3.77 Od. 267 Oe 7.54 You…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…I need step by step process solving [4.184x156(Tf-295)] + [4.184x85.2(Tf-368)] = 0. because my work is wrong. Thank you!!
- ALEKS - Jacqueline Hoppenrey x G convert mg to g - Google Searc x A www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQiHqRdYV 6Ux63Syp.JXz0Coxvwqgg4JkWI72X79QvOLp9_7U27sYQhkaocvdwecGvsUzo65uy3F6spORRg1XSqgh81is O STOICHIOMETRY Using molarity to find solute mass and solution volume Jacqueline A chemist adds 55.0 mL of a 4.75M silver perchlorate (AGCIO,) solution to a reaction flask. Calculate the mass in grams of silver perchlorate the chemist has added to the flask. Round your answer to 3 significant digits. Explanation Check Privacy Accessibil 2021 McGraw-Hill Education All Rights Reserved Terms of UseWhat is the difference between a random heterogeneous material and a segregated heterogeneous material?You are given three unknown samples stored in screw-cappedcontainers and was told to analyse them. You noted that Container A iscloudy and have some particles that are staying near the bottom of thecontainer. Container B is translucent while Container C is transparent. If thecontents of Container A can be separated by simple decantation,what isthe particle size that BEST describes its composition?i. <1 nmii. 1 nmiii. 1 nm-100 nmiv. >1000 nm
- how can i plot this data with a regression line and including r^2 term?5Question: Using a method for the determination of % CaO in limestone the following results were obtained for a NIST Certified Reference Sample (CRM): % Cao 50.38, 50.20, 50.31, 50.22 50.41 Five samples were obtained from a railcar of limestone. The analysis of the samples gave the following results: % CaO 55.01, 59.61, 58.82, 64.39, 62.49 a) Determine the variance due to sampling. b) If the samples taken from the railcar had a mass of 0.500 g, what mass
- a laccd sign i X C tab McGraw-Hil X A ALEKS-Shu X https://www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-lgNslkr7j8P3jH-IvUrTNdLZh5A8CnG03PBGuXr8iCPa7ZMmym9HtY-pEBmXkvCfq... O CHEMICAL REACTIONS Calculating ion molarity using solute mass shift ↑ Calculate the molarity of Cl anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits. caps lock esc Explanation ALEKS A chemist prepares a solution of vanadium(III) chloride (VC13) by measuring out 1.50 g of VCl₂ into a 300. mL volumetric flask and filling to the mark with distilled water. ILION K →1 E mol L ? Type here to search A Graw X HI Check 12 (8) 2 Z W S # 3 X alt $ D 4 C x10 f5 % X 100 LO 5 V f6 4- (0) 6 ALEKS G 14.1 f7 4+ & Y B hp 7 X H McGraw-Hi x A ALEKS-Shix Sign In 시기 fg IAA * © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibilit # a @ 76°F ㅅ 11:03 7/25/2 00 8 N 19 DII 9 fo K M DDI 2/5 0 P 12 insert [ = X + alt prt sc 46 Shusha 0 1 A backs paus cteAssessment-Chem 18-Gen (X 80 $ 54 R UCI General Chemistry Peer Tu X 65.2% Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation CCI, (g) + 2 F₂ (g) →→→ CF₂(g) + 2Cl₂(g) The bonding in the molecules is shown. ΔΗ; = 888 F4 ++++ % 5 FS F-F A 6 New Tab MacBook Air ܀ T Y F6 & 7 CICI CI-CI A4 F7 * 8 ∞ Resources Average molar bond enthalpics. (Hond) kJ. mol Bond 464 C=N 142 N-H 351 N-N 502 N=N 730 N=N 347 F-F 615 811 414 439 331 276 293 615 Bond O-H 0-0 C-0 0=0 C=0 C-C C=C C=C C-H C-F C-CI C-Br C-N C=N DII FB 69 DD F9 kJ Question Source: McQuarrie, Rock, And Gallogly 4e-General Chemistry Publisher: University Science Books 1 0 ) CI-CI Br-Br H-H H-F H-CI H-Br H-S S-S 0 A F10 I' Check Answer P kJ. mol-1 890 390 159 418 945 155 243 192 435 565 431 368 364 225 3 F11 0 + Show All 411) F12 X }4. A new method for the determination of mercury in fish was tested against a N.I.S.T. standard to determine if there was any bias (determinate error) in the new technique. The N.I.S.T. standard fish sample was certified to contain 13.55 ppm Hg. The results of six analyses by the new method gave a mean value of 14.15 ppm and s.d. = 0.42 ppm. Does the new method give accurate results at the 95% confidence level?