Q: How does a CEM detector work
A: Channel electron multipliers (CEMs) are detectors, which respond to charged particles, hard and soft…
Q: 5. 3) Lithium in blood serum of a manic-depressive patient treated with lithium carbonate is…
A:
Q: Suitable analysis wavelengths for caesium (Cs) and zinc (Zn) are 852nm and 214nm respectively.…
A: Wavelength is the distance between the any of the two consecutive crust and trough of a wave. It is…
Q: Analytical Chemistry II Compare between the advantages and disadvantages of atomic emission…
A: Atomic emission spectroscopy: An Atomic spectra occurs when valence electrons from highest-energy…
Q: (A) Suppose a solution contains 0.01 M Fe, has a transmittance of 60 % in a 1 cm cell at 625 nm, The…
A: Absorbance = 2 - log(%T) Also, Absorbance = Molar absorbtivity coefficient × Concentration × Path…
Q: The Ka for HA is 0.078093. What is the value of Kb for A-?
A: Given : Ka for HA = 0.078093 To calculate : Kb for its conjugate base A-
Q: Magnesium in 50ml of blood was extracted and mesured using falame emission AES An emission E 06 was…
A: In flame AES, the signal is proportional to the concentration of the analyte in the sample.
Q: A solution that absorbs at 450-470 nm wavelength can be perceived as what color? O Red O Yellow O…
A: the spectrum of visible light contains Red (high wave length and less energy) Orange yellow green…
Q: Does the amount of radiation (cpm) increase or decrease as the thickness of the shielding increases…
A: Given information, The distance between the source and the sensor stays the same
Q: absorbance of 8.50 X 10-5 solution of the complex when measured in a 1.00-cm cell at 435 nm.
A: The absorbance of a solution can be expressed as follows-
Q: Figure caption: EDS spectrum for a typical metal-rich spherule, K and L lines for noted elements are…
A: From EDS we can get the idea about the element present and it's amount . From here we can calculate…
Q: 2. Use the data below to calculate AH for the reaction N,0, + 3C0 - N,0 + 3C0, AH = ? - 110 - 393 +…
A: Since you have submitted multiple questions, we will solve only first question for you. If you want…
Q: 1. Fill up the necessary "lettered" cells based on the properties given. Units must be based on the…
A: Ideal gases: Those gases that obey the ideal gas equation are said to be ideal gases. It is a…
Q: lassure (mlla 7.5 A3D025 9.4 3 =0.34 %3D 12.5 42=D0.5 7elct the dcta anve on he Graaph welow. 40…
A: There are 4 important parameters which are used to define the gas. They are absolute temperature,…
Q: The chemical shift of tin some compounds are as follows Sn**, 0 mm s Sn (4-coordinate), 2:1 mm s…
A:
Q: Explain the principal work of atomic absorption spectroscopy? And how is it used for the…
A: Atomic absorption spectroscopy is based on the principle that when a radiation is applied on a…
Q: -16 9. What wavelength () of radiation has photons of energy (E) at 2.87 x 10 J?
A: Note: According to our guidelines we are supposed to answer only one question. Kindly repost other…
Q: n in figea Syce Why than fig b" we se the magnet showin NS.
A: If we consider a magnet it will have two sides namely North Pole and South Pole. They are said so…
Q: Given the data in Figure 2, answer the following questions. You may refer to the color wheel and the…
A: A multiple choice question about determining concentration unknown solution.
Q: Quinine in a 1.939-g tablet was to be analyzed by dissolving it with 0.10 M HCI to a final volume of…
A: First relate the 2 using the formula: F = 2.3030SϕIo ebC The S and phi (ϕ) is just constants…
Q: 2. The content of sodium in a cooking salt substitute for a low-sodium diet can be determined by…
A: First, we have to find the concentration of the standard NaCl solution. Then we have to plot the…
Q: (c) Highlight the difference between COSY-45 and COSY-90 and mention their applications.
A: Correlation Spectroscopy (COSY ) shows the correlation between hydrogens which are coupled to each…
Q: Finishingconcentrations in K in one tablet. 20 tablets are weighed (35.6751 g) and reduced in…
A: We need to prepare a calibration plot for the given standards.
Q: Application of Spectroscopy: You wish to measure the iron content of the well water on the new…
A: Absorbance is directly proportional to the concentration of the colored sample as per Lambert-beer's…
Q: 3516S → ? + 0-1e…
A: The respective elements can be found out by equating the atomic number on both side of the reaction.
Q: A student wants to determine the concentration of iron ion in a 15.000 gram solid that contains…
A: As the solution is absorbing green light, the color of the solution would be red according to color…
Q: How would we construct a calibration curve for a solution containing phosphate? Choose all that…
A: Calibration curve is a method to determine the concentration of unknown by plotting the absorbance…
Q: What's a hypothesis about the experiment Colorimetric Determination of Iron?
A: The colorimetric analysis is the determination of change in the intensity of the color of the…
Q: In determining the amount of copper and the identity of the copper compound in the unknown sample, a…
A: As 100 mL solution contains 120.8 mg sample so, 5 mL ,, ,, (120.8 mg * 5…
Q: The effect on motion when an electric potential is applied and positive ions drag a group of…
A: Retardation effect: Retardation is the delaying the process. Thus by Retardation effect is when…
Q: 7) A 25.0 ml sample containing Cu"gave an instrument reading of 23.6 units (corrected for a blank).…
A: Given volume in second solution= 0.5 ml Concentration of second solution=0.0287M Now no. Of milk…
Q: As pH changes, ho will absorbance change t the wavelength of the isosbestic point?
A: An isosbestic point is a specific wavelength, wavenumber or frequency at which the total absorbance…
Q: Does the amount of radiation (cpm) increase or decrease as the thickness of the shielding increases…
A: The amount of radiation (cpm) increase or decrease has to be predicted
Q: 3. (a) Draw the variation of signal strength with applied voltage for a-particles and explain. (b)…
A: This Question is based upon Nuclear Chemistry.
Q: The drug Librium gives a polagraphic wave with E1/2 = -0.265 V (vs SCE) in 0.05 M H;SO4. A 50.0 mL…
A:
Q: What are the atomic cross section and atomic energy absorption cross sections for a 0.5-Me gamma ray…
A:
Q: The number of equivalents of Al+3 in AICI3 is------(the Atomic weight of Al is 27) O 12 07 9 O 8 O…
A: Answer - Option - (c) is correct 9 Given : Atomic weights of Aluminium = 27…
Q: In Atomic Absorption Spectroscopy, Tungsten is the generic material of the cathode in Hollow cathode…
A: In atomic absorption spectroscopy, Tungsten is the generic material of the cathode in Hollow cathode…
Q: 2. FeSCN'(aq) makes a dark orange colored solution (while Fe²* and SCN¯ are essentially colorless).…
A: A color wheel is a circle of colors which illustrate the relation between absorption and…
Q: 12/ACCORDINg to the Bihe matel 4.When'elcotaon jumps from n-4 to n-2 IS the eneryy dBsOPBeD oR…
A: According to Bohr model the ∆E (energy difference) for any two energy level is given by the…
Q: What is commonly determined using Atomic Spectroscopy? Bodn energy Elemental composition…
A:
Q: 5. Describe the principle on which each of the following GC detectors are based: (a) flame…
A: A chromatography detector is a tool used in liquid or gas chromatography (GC/LC) to identify mixture…
Q: A solution containing 1.00mg iron (as the thiocyanate complex) in 100mL was observed to transmit…
A: Given transmittance of the solution is 70.0%. The solution contains 1.00 mg of iron as thiocyanate…
Q: 22.6, t 25.1, t n the highlighted area to zoom. Click again to zoom back out.
A: From C-13 NMR we can identify different types of Carbon with their electronic environment.
Q: 5 2. RED ORANDE YELLOW OREEN BLUE BROWN IL 6 9 4
A: The Retention factor of brilliant blue can be calculated as follows
Q: A colored substance Z, of molecular weight 200, exhibits an absorption maximum at 400 nm. A solution…
A: According to Lambert Beer's law, Absorbance is directly proportional to the Concentration of the…
Q: In determining the amount of copper and the identity of the copper compound in the unknown sample, a…
A:
Q: Fish-liver oil is a good source of vitamin A, which is mea-sured spectrophotometrically, after…
A: (a) At an absorbance of 329 nm the sensitivity to the absorbance of light by Vitamin A is maximized…
Q: Calculate the effective core load for 58Ce, 59Pr and 60Nd containing 4f electrons.
A: Introduction: Effective nuclear charge: It is a function of total nuclear charge which is…
Step by step
Solved in 3 steps with 2 images
- Explain why is FAAS a good method of quantifying Ca in milk?Absorbance at 453 nm 8393939 7 fl. oz./20 ml Beer-Lambert's Law (Spectrophotometry) #1 Fe (aq) + KSCN(s) FESCN "(aq) + K" (aq) 3+ To determine the moles of Fe (aq) in a 100. mL sample of an unknown solution, excess KSCN(s) is added to convert all the Fe (aq) into the dark red species FeSCN"(aq), as represented by the equation above. The absorbance of FESCN"(aq) at different concentrations is shown in the graph below. 2+ 0.50 目0.40 0.30 0.20 01 0. 0. 5 x 10-5 10 x 10-5 Concentration of FESCN2+ (M) If the absorbance of the mixture is 0.20 at 453 nm, haw many moles of Fe (aq) were present in the 100. mL sample? (Assume that any volume change due to adding the KSCN(s) Iis negligible.) 3+, 4x10-4 mol 3 x 104 mol (B) 4x 10-6 mol 3x 10-6 molA 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.
- Activities and Assessments: 1. Determine the Ecell values for the following: a. TI (s)|Tl* (aq) || Sn²+ (aq) | Sn(s) b. Zn(s)|Zn²*(aq) || Fe³*(aq), Fe²*(aq)| Pt c. Cd(s)| Cd²+(aq)|| H* (aq)|H2(g) | Pt d. Fe2+ + Mn0; → Fe3+ + Mn²+ e. Sn + NOz → Sn02 + NO2 f. Zn + NO, → Zn²* + NH g. The oxidation of iodide ion I- by permanganate ion Mno, in basic solution to yield molecular iodine l2 and manganese (IV) oxide Mn02. 170.Q1. To determine the concentrations (mol/L) of Co(NO3)2 (A) and Cr(NO3)3(B) in an unknown sample, the following representative absorbance data wereobtained.A (mol/L) B (mol/L) 510nm 575nm5×10−1 0 0.714 0.0970 6×10−2 0.298 0.757Unknown Unknown 0.671 0.330Measurements were made in 1.0 cm glass cells.i. Calculate the four molar absorptivities: ∈A(510), ∈A(575), ∈B(510) and ∈B(575).ii. Calculate the molarities of the two salts A and B in the unknown.10 Wavelength, 1. (nm) E (Red, µ.Mcm- ɛ(Yellow, µMr'cm¬1) Absorbance 500 0.0369 0.000549 0.405 430 0.00506 0.0167 0.474 An orange colored solution is prepared by mixing a red dye solution with a yellow dye solution and the absorbance was measured at the analytical wavelengths of 430 nm and 500 nm. The table provides the molar absorptivity for the red and yellow dye at each analytical wavelength. Calculate the concentration (in u.M) of the red and yellow dye in the mixture. [red] = [yellow] =
- Given C6H12O2 chemical formula. chemical shift , intergration, multiplicity and interpretation needed.What causes exposure or closeness in humans: [Explain in detail and thenjustify why]a) to an IR lamp?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 solid
- You have a white light source followed by a blue filter (which allows only blue light to pass). An unknown sample contains molecules B that absorb blue light. You measure transmittance and obtain T = 10% (0.1). Assume that you dilute this sample 10 fold. What is the absorbance, A, that you expect to measure in the diluted solution? O a. log,,(1.6) ОБ. 10 O. 0.01 O d. 0.1 Oe. 11FbhGb6cd_1-5c/IV_Ivqu J4002epq/z4kbhpYZSIA opy ✩✩ IS Extensions Help I text Calibri. 12 +BIU A d f5 A % 5 T f6 1 5 J 1. Why is it recommended to have a carbon monoxide detector on each floor of a home? Page 4: Water Pollution: Questions i M 6 2. What impact would the increased use of electric vehicles have on environmental damage caused by acid rain? Page 3: More Air Pollution Issues: Questions 4. The COVID-19 pandemic forced many people to work from home for extended periods. During these periods, many cities reported unusually low levels of smog. Suggest an explanation for this observation. 5. Explain how ozone can be both harmful and beneficial. 3. Why is ground level ozone most likely to reach its highest concentrations on hot, sunny days during periods of heavy traffic in large cities? f7 Y []») 3 6. India relies heavily on burning coal to generate electricity. How does India's reliance on coal contribute to the poor air quality experienced in many of India's major cities? & 7 18…(5) A sample of sodium phosphate is dissolved in water to give 100.00 mL of solution (Solution A). Then this solution is diluted 5 times to give the final solution (Solution B). Solution B is Known to contain 3.920 x 1022 number of PO43- ions, which has an absorption peak at 460 nm and absorbance value of 0.355 in a 1.000 cm cuvette. (i) Calculate the molar absorptivity of Solution B. (ii) What mass of sodium phosphate (MM 163.94 g/mol) dissolved in Solution A.
