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- The refractive index of a compound at 16°C is found to be 1.3982. Correct this refractive index to 20°C.Suppose that a solution has an absorbance of 0.226 at a wavelength of 450 nm. If the concentration of the solution is 24 μM, what is the value of the molar absorptivity? The data were taken with a standard 1-cm cuvette.The drug tolbutamide (MW 270.0g/mol), a treatment for type 2 diabetes, has a molar absorptivity of 703 /M/cm at 262nm. One tablet was dissolved in 250ml of water. A 10.0 ml aliquot of this solution was diluted to 100.00 ml in a volumetric flask. This diluted solution exhibited an absorbance of 0.275 at 262 nm in a 1.00 cm cell. What is the mass of tolbutamide in the tablet?
- 4 Determine the time in seconds required to sputter 50 nm of Si using a 10 µA/cm2 beam of 45 keV ions of (a) Ne, (b) Kr, and (c) Xe.a) The refractive index (μ) of water is found to have the values 12.9,12.5,12.3 and 11.8.Calculate the standard deviation for the refractive index of water.extinction coefficient = ε, path length = b, concentration C A sample containing an unknown concentration of FeCl3 is measured to have an absorbance of 0.43 at 334 nm in a 1.0 cm cuvet. What is the molar concentration of the solution
- Suppose that a solution has an absorbance of 0.250 at a wavelength of 450 nm. If the concentration of the solution is 22 μM, what is the value of the molar absorptivity? The data were taken with a standard 1-cm cuvette. molar absorptivity in (L cm^−1 mol^-1):A sample of colored solution in a 1 cm cuvette has absorbance 1.0 at 360 nm. How much of the incident light (in %) was absorbed by the solution at this wavelength? Select one: 10% 90% 0 100%Define refractive index of liquids . How we measure the refractive index of liquid by abbe's refractometer?
- An aqueous solution containing 9.01 g of an optically-pure compound was diluted to 6.00 × 102 mL with water and placed in a 10.0 cm long polarimeter tube. The measured rotation was -4.13° at 25° C. Calculate the specific rotation of the compound. [a=The concentration of a glucose solution was determined via a DNS assay, and it was determined that a 150.0 mM solution would have an absorbance of 0.156. If the pathlength used was 0.95 cm, what is its molar absorptivity constant, in L cm mol 1?The refractive index of a solution composd of a subtance with a molecular formula of C6H6O2 with a density of 0.96 g/cm is 1.3 at 25°C. what is its Molar Refraction in cm3 Imole ? Final answer in 2 decimal places. C = 12.01; H =1.00, O = 15.99