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- why does the choice and use of a blank matter for Spectrophotometry?What are the main components of a spectrophotometer? Choose all that applies. radiation source sample compartment/holder monochromator detector" Spectrophotometric analysis" refers to methods that are based on light absorbance. O True False
- detector Answer Bank emission monochromator excitation monochromator light source sample cell ^ex A em It is typically a grating, prism, or filter that selects a narrow wavelength band of radiation and passes it to the sample. It holds the sample and has a defined pathlength. It is typically a photomultiplier tube that generates an electric signal when struck by photons. It is positioned 90° to the incident light and selects a narrow wavelength band of radiation to pass toThe maximum number of spectra that can be recorded per second by ToF-MS is limited by the time taken by the slowest ions to go from the source to the detector. If the slowest ion took 45.6 microsecond to travel, at what frequency could you record spectra if a new extraction cycle were begun each time this heaviest ion reached the detector? 30000 spectra/s 10000 spectra/s 11000 spectra/s 500 spectra/s 22000 spectra/s3. Fill in the following for the correspondence between % transmittance and absorbance: 100.0 % T = 0.0 absorbance 1.00 absorbance = (0.0 % T 25.0 % T = absorbance 0.25 absorbance = % T
- A compound has the chemical formula C5H11Cl. The M+ peak should be at m/z = m/z = and an M+2 peak at m/z = and there should also be an M+1 peak at If the height of the M+ peak is 27, the height of the M+1 peak should be (specify to one place after decimal) and the height of the M+2 peak should be approximatelyUnce started, this test must be completed in one sitting. Do not leave the test befa Remaining Time: 31 minutes, 25 seconds. Question Completion Status: A Moving to another question will save this response. Question 13 The calibration standard (or internal standard) for H spectrum is TMS delta (6) high-field or upfield side low-field or downfield side MHz AMoving to another question will save this response. MacBook Air O00 O00 F4 F7 F6 F5 F3 F2 F1Q3. Why do double-focusing mass spectrometers give narrower peaks and higher resolutions than single-focusing instruments? Figure 1 is a simplified diagram of a commercially available El source. Filament 000 P Repeller SS ← Target Accelerating plates and slit Figure1: Schematic of an El source (a) What voltage must be applied between the filament and target so that electrons interacting with molecules at the point marked SS (sample source) will have 70 eV of kinetic energy? (b) What will happen to a molecule that diffuses toward the filament and is ionized at point P?
- Graph transmittance vs. wavelength from the data table using graph paper or a computer. Plotting this data will result in two lines, one for each solution. Be sure to clearly indicate which line correlates to which solution. Also, label the axes of your graph appropriately and include a descriptive title. (2) Answer the following: (a) At which wavelengths did each solution have the highest % transmittance? (b) Do the wavelengths (at the highest % transmittance) match to the color of the solution in the visible light range? Why or why not? Purple: 380 – 450 nm Green: 495 – 570 nm wavekength,nm %Transmittance of Ni (no (NO3)2 %Transmittance of KMnO4 350 84% 36.60% 375 59% 33.40% 400 48.80% 53.40% 425 70% 65.20% 450 89.60% 54% 475 96.40% 33.80% 500 98.40% 27% 525 98.40% 27% 550 97.20% 26.80% 575 94.60% 30.20% 600 87.20% 54%…(2) The function ? ( x ) = A(x/L)²[1-(x/L)] Show Transcribed Text is an acceptable wave function for the particle in a 1-dimensional infinitely deep box of length L. a) Calculate the normalization constant A. b) Calculate the average values of x and x² for this state, and use these to calculate the standard deviation, ? = ²>-What are the differences between a mass spectrometer and a IR spectrometer?