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Convert the accompanying transmittance data to absorbances:
(a) 25.5%
(b) 32.8%
(c) 0.085
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- Express the following absorbances in terms of percent transmittances.(a) 0.0356(b) 0.379(c) 0.4851. (a) Briefly explain why IR spectroscopic data is reported in wavenumbers and not absorbance or transmittance? (b) True or False: The energy released by an excited fluorescent material is immediately released after exposure to the light source.Fish-liver oil is a good source of vitamin A, which is mea-sured spectrophotometrically, after correcting for background, ata wavelength of 329 nm.(a) Suggest a reason for using this wavelength.(b) In what region of the spectrum does this wavelength lie?(c) When 0.1232 g of fish-liver oil is dissolved in 500. mL of sol-vent, the absorbance is 0.724 units. When 1.67X10⁻³g of vita-min A is dissolved in 250. mL of solvent, the absorbance is 1.018 units. Calculate the vitamin A concentration in the fish-liver oil
- Convert the following transmittance data to absorbance. a) 27.2% b) 0.579% c) 30.6%(a) Prove the relationship between the absorbance and concentration in Beer Lambert's law. What is the absorbance (A) of a sample if the transmittance (T) is 0.347?state the relationship between absorbance and transmittance
- 1) What is the % transmittance of a solution that has an absorbance, A of 0.598 ? %T = ?2. Express the following absorbances in terms of percent transmittance. a ) 0.918 b) 0.072Atomic refractions: C(sp3): 2.8158; C(sp2): 3.8276; C(sp): 3.8974; H: 0.915. Knowing that the refractive index of benzene is 1.4956 (with the Na line D), indicate the molar volume of benzene.(1). 22.1 cm3/mol (2). 76.6 cm3/mol (3). 97.6 cm3/mol (4). 98.8 cm3/mol
- Acetone shows maximum absorbance at 279nm in hexane where in water its Amax is 265nm Justify.1.4 A 6.25 x 10-³ M solution of potassium permanganate (KMnO4) has a transmittance of 47.4% when measured in a 1.5 cm cell at a wavelength of 625 nm. (a) Calculate the absorbance of the KMnO4 solution (b) Calculate the molar absorptivity of KMnO4what is the relationship between absorbance and transmittance? kindly explain it briefly