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5 What is the
a. 15
b. 8
c. 7
d. 1
6 Methods that employ separation of the product chemically through precipitation, with purification, drying and weighing of the resultant product:
A. Spectrophotometric analysis
B. Volumetric analysis
C. Gravimetric analysis
D. Gasometric analysis
7 Phase changes involving fusion, except:
a. Solid to liquid
b. Liquid to solid
c. Gas to liquid
d. Gas to solid
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- 3. (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 dinlList and describe all advantages of XRF and NAA techniques6 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 5:48
- What is the structure of function of this molecule. a w x x x x x x x x x b -1 2 3Just fill the blank no need of explanantion.. Thank yuMatch 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 -
- Explain the difference between a. nucleation and particle growth b. occlusion and mixed-crystal formation c. precipitation and coprecipitationOn the Moon’s surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. What percent correction is needed to account for the delay in time due to the slowing of light in Earth’s atmosphere? Assume the distance to the Moon is precisely 3.84×108 m , and Earth’s atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n = 1.000293.Suppose the difference in rest energy of the neutron and proton were Qn = (mn − mp)c2 = x MeV instead of Qn = 1.29MeV, with all other physical parameters unchanged. Estimate Ymax, the maximum possible mass fraction in 4He, assuming that all available neutrons are incorporated into 4He nuclei. Hint: Compare the new rest energy of the neutron to the electron and consider how that would impact the decay of neutrons. Will free neutrons decay at all in this scenario? If the neutron decay is negligible, then the ratio of protons to neutrons to protons will remain the same as it was at the time of freeze-out (for a given Qn). Value: x=0.158 MeV
- Solving EquationsSolve the following equation for V2:P1V1 = P2V2Inductively coupled plasma-optical emission spectroscopy (ICP-OES) is a quantitative method for determining trace elements in liquid samples. ICP-OES and other methods of spectrochemical analysis are typically subject to errors due to the present of interferences. It had been reported that ICP-OES is significantly affected by spectral interference, but relatively less affected by the chemical interferences. (111) When analyzing Pb by utilizing ICP-OES, the presence of coexisting elements in the sample solution may lead to the ionization interference. Do you think the use of the following elements: Cs, Na, and Ba can minimize the ionization interference caused by the coexisting elements? Explain. Given that the first ionization energies for these elements are: Cs (3.89 eV), Na (5.14 eV), Ba (5.21 eV), Pb (7.41 eV), respectively.What is the significance of whether the fluorescent substance in fluorescent tubes has a short or long phosphorescence?