A Grade A buret is used in a titration experiment. Calculatethe uncertainty e of the volume delivered by a buret based onthe data below. The typical uncertainty of a Grade A buret is e= 0.02 mL.initial reading = 0.25 mLfinal reading 10.22 mLThe uncertainty of the volume delivered by the buret is ±mL. [Just write the numerical answer. Use, ifnecessary, a "cosmetic zero" when writing numbers less than1; e.g. "0.1234", not ".1234"]

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Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.12QAP

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7. 22 This question is about several salts. (a) A hydrated salt, compound A, is analysed and has the following percentage composition by mass: Cr, 19.51%; CI, 39.96%; H, 4.51%; O, 36.02%. Calculate the formula of compound A, showing clearly the water of crystallisation. Show your working. formula of compound A = (b) A student carries out an experiment to determine the amount of water of crystallisation in the formula of another hydrated salt. The student intends to remove the water by heating the hydrated salt. A diagram of the apparatus used by the student is shown below. crucible pipeclay triangie The student adds the hydrated salt to the crucible and weighs the crucible and contents. The student heats the crucible and contents and allows them to cool. The student weighs the crucible and residue. The student's results are shown below. 16,84 Mass of crucible + hydrated salt/g 16.26 Mass of crucible + residue after heating/g
What is number 5?
Give detailed Solution with explanation..don't give Handwritten answer
None
Describe the steps you would take to write the chemical formula for the compound bromine pentafluoride. Answer in complete sentences. Make sure to use the formula editor when you are writing subscripts. I !!! H Normal А А Enter your answer here ||| BIUS √x 20 Tx
i need the answer quickly
Richards and Williard determined the molar mass of lithium and collected the following data (a) Find the mean molar mass determined by these workers. (b) Find the median molar mass (c) Assuming that the currently accepted value for the molar mass of lithium is the true value, calculate the absolute error and the present relative error of the mean value determined by Richards and Williard. (f) What factors have led to changes in molar mass since 191? (g) How would you determine the accuracy of a molar mass? Experiment Molar mass, g/mol 1 6.9391 2 6.9407 3 6.9409 4 6.9399 5 6.9407 6 6. 9391 7 6. 9406
On a balance mass an amount of potassium hydrogen phthalate (KHP) needed to neutralize approximately 12 ml of 0.1 M NaOH(aq), and completely transfer the KHP to a clean 125-ml Erlenmeyer flask. Record the mass of the KHP at least to The thousandth decimal place. please answere
BaCl2(aq)+H3PO4(aq) --> Ba3(PO4)2(s) + HCl(aq) Express you answers as inetergers seperated by commas
so the questions are answer but I have some questions so how they got 2I- and how they got 2.22x10-8 in the bottom like I want to know the process of finding 2.22x10-8? so How they knew to put H2O on both side and CN-and the math process to find o.6 and how they got 1.929x10-5?
Carbon 14 dating The technique of carbon 14 (4C) dating is used to determine the age of archaeological and geologi- cal specimens. The formula T = -8310 In x is sometimes used to predict the age T (in years) of a bone fossil, where x is the percentage (expressed as a decimal) of 14C still pres- ent in the fossil. (a) Estimate the age of a bone fossil that contains 4% of the 14C found in an equal amount of carbon in present- day bone. (b) Approximate the percentage of "C present in a fossil that is 10,000 years old.
M Inbox ( x Precalc X A HOLID X Oluwa X Good ь Chemi X A fake X G spiral G the sar X X Micros X https://papers.xtremepape.rs/CAIE/IGCSE/Chemistry%20(0620)/0620_s05_qp_6.pdf The same mass of zinc was used each time. The volume of acid used was different each time. Use the syringe diagrams to record the volume of hydrogen produced each time in the table. Table of results volume of sulphuric acid/cm volume of syringe diagram hydrogen/cm3 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 15 10 20 30 40 50 60 70 80 20 10 20 30 40 50 60 70 80 25 10 20 30 40 50 60 70 80 30 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 35 40 10 20 30 40 50 60 70 80 ENG 23:09 O Type here to search 27°C US 21/04/2022

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