A technique used in observing trace elements, isotopes and atomic monolayers based on the secondary ions that are ejected from the sample. O XRD O AFM SEM O SIMS O XPS ONLO ELLIPSOMETRY
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- 5 What is the atomic number of a neutral atom that has 8 neutrons and 7 electrons? a. 15b. 8c. 7d. 1 6 Methods that employ separation of the product chemically through precipitation, with purification, drying and weighing of the resultant product: A. Spectrophotometric analysisB. Volumetric analysisC. Gravimetric analysisD. Gasometric analysis7 Phase changes involving fusion, except:a. Solid to liquidb. Liquid to solidc. Gas to liquidd. Gas to solidJust fill the blank no need of explanantion.. Thank yu3. (a) Calculate the number of core and surface atoms for a 40 nm spherical FCC Cu particle. Find out the surface coverage of atoms. Calculate surface area to volume ratio of the particle. (Given, radii of Cu=0.128 nm); Diameter Shell 49d 99d 125d 156d XXL number 25 50 60 80 dinl
- Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H = 1; N = 14.01; S = 32.06; Cl = 35.45; 1.) Calculate the MgO content of 12.35g Magnesia Magma, which has been dissolved in 50mL of 1.0340N H2SO4 and required 24.6mL of 1.1255N NaOH in the back titration.6 Collig Notes (1).pdf A ALEKS - Jeneen Abdelra X M Mathway Algebra Prol X G molar mass of zinc chi X Launch Meeting-Zoom x G 0.16kg to g-Google Se x + www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-lgNsikr7j8P3jH-lix5uFZIvj2iEJjQd1WoxT77ErtzZpGbzESWMK5SbMzyGfsmkWQSq2n2qsprma6JcCeltVTwZDkOLh51 Rytx20V. =D O GASES, LIQUIDS, AND SOLIDS Using the Kf and Kb equations with electrolytes Jeneen V The normal bolling point of a certaln Ilquld X is 148.70 °C, but when 13. g of alanine (C,H,NO,) are dissolved In 250. g of X the solution boils at 149.5 °C İnstead. Use this information to calculate the molal boiling point elevation constant K, of X. Be sure your answer is rounded to the correct number of significiant digits. dlo °C kg K, =[] x10 mol Explanation Check 2021 McGraw-Hill Education, All Rights Reserved. Terms of Use Privacy | Accessibility 5:481. For AAS analyses, the following are atomization techniques except- A. Hydride atomizationB. Chemical discharge atomizationC. Glow dischargeD. Electrothermal atomizationE. All of the choices are falseF. None of the choices give 2. An X-ray photon of wavelength 2.70 Angstrom has an energy in electron volts of – A. 4.59 x 10^3B. 7.36 x 10^(-16)C. 7.357 x 10^(-16)D. 4.60 x 10^3 3. The percent transmittance of a solution that gives an absorbance of 0.786 is- A. 0.1045B. 16.4C. 6.11D. 78.6
- A chemist obtained the following data for percent lindane in the triplicate analysis of an insecticide preparation: 7.23, 6.95, and 7.53%. Calculate the 90% confidence interval for the mean of the the three data, assuming that (a) the only information about the precision of the method is the precision for the three data. (b) on the basis of long experience with the method, it is believed that s---->σ lindane. (c) If s=0.28 is good estimate of σ, how many replicate measurement should be made in order for the mean for the analysis of sample to be within 0.2% of the true mean 90% of the time.rive - Google X O Logout Successful X OMail - Martin, And X e Registration - Lifer x D Sign In w.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [Review Topics) [References] Use the References access important values if needed for this question. Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on "submit" Write the balanced NET IONIC equation for the reaction that occurs when hydrofluoric acid and potassium hydroxide are combined. This reaction is classified as A. Strong Acid + Strong Base B. Weak Acid + Strong Base C. Strong Acid + Weak Base D. Weak Acid + Weak Base The extent of this reaction is: A. Below 50% B. 50% C. Above 50% D. 100% Submit Answer Retry Entire Group 8 more group attempts remaining Previous Next 10/ 近The aluminum ion (Al) (Atomic number = 13) is iso %3D electronic with: اختر احدى الدجابات O a. o2 (Atomic number = 8) а. O b. Ar (Atomic number = 18) +3 c. Fe (Atomic number = 26) O d. Kr (Atomic number = 36)
- Match each statement with one or more of the following: flame AA, flame photometry, atomic fluorescence, ICP, graphite furnace AA, and spark emission. (a) The technique that uses a partially ionized stream of argon gas called a plasma - (b) The technique in which a light source is used to excite atoms, the emission from which is then measured - (c) The three techniques that require light to be directed at the atomized ions - (d) The technique that utilizes a solid sample - (e) The four techniques that measure some form of light emission by excited atoms present in an atomizer - (f) The absorption technique in which the atoms are in the path of the light for a relatively short time - (g) The technique in which the emitting source may reach a temperature of 6000 K -Please see attached photos and answer accordingly. Thank you.STANDARDIZE THE Na,S:Os.SH2O WITH KIO.. Weight of KIO, = 0.5325 g Vot KIO: = 250 ml N KIO, V KIOL ml. 7.0 7.0 VNas:O1.5H0, mL 8.2 7.5 N Nas2O.5H;0 Average N Nays:0,5HO