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- “Atomic absorption spectroscopy (AAS) and UV-Vis spectroscopy is similar in principles”. Do you agree with this statement? Explain briefly.1. Under what conditions can light be modeled like a ray? Like a wave? Wave fronts Opening is very wide opening or device. Opening is about the same size as Figure 1.31 Huygens's principle applied to a plane wave front striking an opening. The edges of the wave front bend after passing through the opening, a process called diffraction. The amount of bending is more extreme for a small opening, consistent with the fact that wave characteristics are most noticeable for interactions with objects about the same size as the wavelength. 1. Light can be modeled as a ray when devices are large compared to wavelength, and as a wave when devices are comparable or small compared to wavelength.A chemistry student at GGC synthesized a new sulfonamide (S7) drug to help treat malaria. Using a spectrophotometer the student observed that S7 converts to a colorless molecule in the presence of malaria parasite called Plasmodium falciparum. To study the rate of reaction, the student recorded the absorbance/amount of S7 at a wavelength of 570 nm. The results are summarized in the table below: Time (s) Absorbance/Amount of S7 0.80 0.63 10 0.50 15 0.40 20 О.32 25 0.25 30 0.20 Determine the half-life of S7. Include units in your answer MacBook Air 000 000 F8 80 F7
- Drag the pictures into the correct order, name the phase, and describe what occurs during each phase. Image here Image here (3) Image here Image hereName the colors in a color spectrum of visible light from low to high wavelength.Different light source requires for the molecular absorption spectrometer and for an atomic absorption spectrometer. Describe, which type of light source used by each spectrometer and also explain why these two spectrometers requires different light sources? As a part of your answer, also explain the consequences if these two light sources are gets interchange?
- 6. Assume that you have an “X" solution that you do not know its concentration. But you have other X solutions with known concentrations and you know X solution absorbs maximum light at 575 nm. To calculate the unknown solution concentration, you have done some spectrophotometric obtained data given below. measurements and Prepare a standard curve by using the a) absorbance of known concentrations (Hint: you can learn how to prepare a standard curve by using Excell from youtube). Calculate the concentration of unknown. b) Table 1: Absorbance of X solution (575 nm) Concentration (mg/ml) Absorbance 0.025 0.220 0.050 0.440 0.100 0.760 0.150 1.250 0.200 1,460 unknown 0,640Which of the following statements is true? 1) The shortest wavelength of light is the ultraviolet ray, which is the highest in energy. 2) The longest wavelength of light is the ultraviolet ray, which is the highest in energy 3) The shortest wavelength of light is the visible light, which is the highest in energy 4 ) The shortest wavelength of light is the infrared ray, which is the highest in energy. 5) The longest wavelength of light is the infrared raywhich is the highest in energy .What is the color-change in the LAMP reaction based on? Would it matter if a test person drank a glass of soda/lemonade right before the test? Suggest 2 practical actions that would circumvent this potential pitfall.
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