Mass of emptyweighing paperMass of weighingpaper + unknownMass of unknownTrial 1Trial IITrial III0.8492.90g0.83g2.8792.04g0.85g2.90g2.05g2.06gVolume of H2SO420.00 mL20.00 mL20.00 mLInitial buret reading,Vinitial0.5mlFinal buret reading, 32.6mlV finalVolume of NaOHused for titration(Vinitial - Vfinal)32.1m0.1ml0.5ml32.2ml 30.7ml32.1ml 30.2ml 21.0HmolesDetermine the number of equivalents of H2SO4 added to each of the unknownsamples.

StepsGiven:Molarity of H2SO4 = 2 MVolume of H2SO4 = 20.00 mL = 0.0200 LCalculation:Moles of H2SO4 =…

Answered: Mass of empty weighing paper Mass of…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.27QAP

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2) As an example of precision and accuracy of data, suppose the % carbon in a single compound has been measured thrce separate times by 2 different students. The theoretical % carbon is 21.34%. Student 1: trial 1:26.11%, trial 2: 26.24% trial 3: 25.92 %, Avg - 26.09 Student 2: trial 1: 20.35%. trial 2: 22.64 % trial 3: 19.79 %. Avg = 20.93 a) Which student had the more precise data and how can you tell? b) Which student had the more accurate data and how can you tell? 3a) Calculate the % error of Student 1 data in problem 2 above. Show all work below. WATCH SIG FIGS
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Mon 4:35 PM nnections | Un X * Student Employment | Car X Illinois State University : H X Mind Tap - Cengage Learn X G If a sample of lithium con index.html?deploymentld%3D55750828934189288909969212&elSBN=9781305657571&nbld%3D2199898&snapshotld%3219989. * DTAP Q Search this Use the References to access important values if needed for this question. If a sample of lithium contains 2.50x10 atoms of lithium-7 and 2.00×10³ atoms of lithium-6, what is the percentage of lithium-6 atoms in the sample? Submit Answer 5 question attempts remaining Next Autosaved at 4:32 PM Back
bu x Tn Course: CHM 2045 X G traductor inglés es x Course Home X (52) Jesús Adrián n/course.html?courseld=17244391&OpenVellumHMAC=a7c4ca4fd317b8b94f4fb8424c70763f#10001 image source... GC1 sp22 Home dic properties Radii Part C The following ions contain the same number of electrons. Rank them in order of decreasing ionic radii. Rank from largest to smallest radius. To rank items as equivalent, overlap them. View Available Hint(s) Na A1³+ 0² Mg²+ N3 F Largest radius K The x G Br, Sb, ane Reset Smallest radius Help
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6 cmole) of Mg2* weigh: (Mg At. wt. = 24 g mole1) 720 mg O144 mg O 2880 mg O1440 mg
- OWLV2 | Assigr X MindTap Cen X gs MindTap - Cen x Gamu of ca Go X b My Questions static/nb/ui/evo/index.html?elSBN=9781337790840&id%3D299783426&snapshotld%3D7857658& CENGAGE MINDTAP Q sea napter 8: Chemical Composition AA e. aluminum sulfate Answer 51. For each of the following samples of ionic substances, calculate the number of moles and mass the positive ions present in each sample. a. 4.25 g of ammonium iodide, NH,I b. 6.31 moles of ammonium sulfide, (NH4), S c. 9.71 g of barium phosphide, BagP2 d. 7.63 moles of calcium phosphate, Caz (PO4)2 52. For each of the following ionic substances, calculate the percentage of the overall molar mas
vo/index.html?deploymentld355750828934189288909969212&elSBN=9781305657571&snapshotld%3D2199898&id-1... To NDTAP Q Search this cours Use the References to access important values if needed for this question. A sample of GeBra with a mass of 29.6 g was treated in such a way that all of its germanium was captured in the compound Ge S,Br4. Compute the mass (in grams) of this product. grams • Submit Answer 5 question attempts remaining
Can paper chromatographt be used to separate and identify very volatile substances? Explain.
Based on the given data, what is the λmax of cobalt? 0.1M Cobalt 300 0.451 325 0.467 350 0.584 375 0.629 400 0.694 425 0.673 450 0.541 475 0.433 500 0.423 525 0.327 550 0.264 575 0.245 600 0.233 625 0.211 650 0.189 675 0.187 700 0.165
B Brock Sakai : CHEM 1P91 - Fall X b My Questions | bartleby ChemTeam: Combustion Analys X G oxygen molar mass - Google S X B Brock Sakai : CHEM 1P91 - Fall x + Ims.brocku.ca/portal/site/90b45528-0b04-4bd2-85b6-897046a1e998/page/7011eaa9-4e38-4b06-9e15-1973abb58ef6 Version 264 Assign 4 1 / 2 100% + equations are: 3 KC1O (aq) → 2 KC1 (aq) + KCIO; (aq) 4 KC1O3 (aq) → 3 KC1O4 (s) + KCI (aq) What mass of KC1O4 (in kg) can be obtained from 2.80 kg of KC1O when these reactions are carried out? Molar masses (g/mol): KC1O 90.55 KC1O4 138.55 5. An organic compound containing only C, H, and possibly O was subjected to combustion analysis. A sample weighing 0.4161 g yielded 0.686 g CO2 and 0.187 g H2O. What is the empirical formula of the compound? 6. For the complete redox reaction given here, (a) break down each reaction into its half reactions; (b) identify the oxidizing agent; and (c) identify the reducing agent. 2 FeCl3 + Zn –→ ZnCl2 + 2 FeCl2 Give the oxidation number of nitrogen in each of…
Times New. 10 -A A Aa | A m。M.一MH 一 24| T 明叫山国一=。一险<田。 AaBbCcDdE AaBbCcDdE AaBbCcD AaBbCcD. B IUv ab X X 2- A v Normal No Spacing Heading 1 Styles Pane Title Dictate Sensitivity Cr 1. The diameter of a neutral Helium atom is about 1 x 102 pm. Suppose we could line up Helium atoms side by side in contact with one another. Approximately, how many atoms would it take to make the distance from end to end 1 cm? 2. What is the mass number of an iron atom that has 28 neutrons? 3. Determine the number of protons and neutrons in the nucleus of : a) He z=2 A=3 b) He z=2 A=4 c) Mg z= 12 A= 24 d) Mg z=12 A=25 e) Ti z= 22 A=48 f) Br Z= 35 A = 79 Write the annronriate evmbol for each of the followwing: 252 words O Focus English (United States) Page 1 of 2 MacBook Air

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