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- Quantitative Analysis by External Standard Method Calcium in a juice sample is determined by atomic absorption spectrophotometry. A stock solution of calcium is prepared by dissolving 1.834 g of CaCl, 2H20 in water and diluting to 1000.0 mL. A substock calcium solution was prepared by transferring 10.00 mL of the stock to a 100.00 mL volumetric flask and diluting to the mark. Three standard solutions of calcium were prepared by transferring 2.500 mL. 5.00 mL and 10.00 mL of substock to 50.00 mL volumetric flasks and diluting to the mark. The sample is prepared by transferring 1.000 mL of fruit juice from the original bottle to a 25.00 mL flask and diluting to the mark. Strontium chloride is added to all solutions before dilution to avoid phosphate interference. Instrumental response of the standards is measured against the blank, and the following readings are recorded: 9.10, 18.6 and 37.0. The sampie reading is 28.1. Using the multipoint method, find the concentration of calcium in…| 37-C1 104-Pd 114-Sn 116-Sn 123-Sb 202-Hg 206-Pb 100000 SAMSUNG LIVEWORKSHEETSSPECTRA FOR HOMEWORK 11, CHE 230 002 This page is not to be submitted to Gradescope. Use these spectra as you answer questions on the Homework 11 document. Spectra for Problem 1 100 %T 80 60 40 20 Relative Intensity 4000 100- 80 8 60- 40- 20- 0 20 2H 2H 3000 m/z 50.0 75.0 76.0 155.0 157.0 183.0 185.0 212.0 214.0 100.0 97.5 11.8 11.7 1686 cm 40 60 80 2000 rel, intensity 11.9 16.9 17.6 28.8 27.8 Wavenumber[cm-1] 100 120 m/z 1500 7.90 7.85 7.80 7.75 7.70 7.65 7.60 7.55 1588 cm² 20 20 ₂ مسلسل..............للمسلسل ppm 140 160 180 200 220 2H 1000 3.12 3.00 2.95 2.90 3H 500 400 A. Propose a molecular formula for this compound B. Propuse. a structure selected 1.25 1.20 1.15 201
- atomic mass: 303.353 g/molWhat is a 99% confidence interval uncertainty of the slope when we are given a trendline with a slope of 42.211 and an R² value of 0.9991 for a set of 145 data points?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
- I need help with the chart being filled out please and thanks.Use the unknown to solve. Label the peaks.ntent s / Unit E- Quantitative Relationships in Chemical Changes / Unit E: Section 3 - Assignment 14 Resources pH 7. 0 Use the following two titration curves to answer each of the following statements. Select the choice that completes the statement correctly. Communication Graph A 25 volume of titrant added (mL) 141 pH 7 Grades 0 Graph B My Teacher 25 volume of titrant added (mL)
- - 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 masA quality-control laboratory analyzes a product mixture us-ing gas-liquid chromatography. The separation of components ismore than adequate, but the process takes too long. Suggest twoways, other than changing the stationary phase, to shorten theanalysis timeThe molar mass of an unknown organic liquid (M - 100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates to expel the air and fill the flask with the unknown vapor at atmospheric pressure. After cooling to room temperature the flask and its contents are reweighed. The uncertainty in which piece of apparatus causes the largest percentage error in the molar mass? (A) balance (+0.01 g) (B) barometer (+0.2 mm Hg) (C) flask (+1.0 mL) (D) thermometer (+0.2 °C) Please explain reasoning quantitatively and qualitatively. Thank you!