A compound has a strong absorption at 8.37x1015 Hz. What is the Amax( in Å (angstroms)) for this compound? (Write answer in decimal form to one decimal place, for example, if answer is 75.667 then write as 75.7)
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- In determining the concentration of a sample X, it was found that it has maximum absorbance at 275 nm. Compound X, has molar absorptivity at 275 nm of 8400 L / mol.cm. Using a spectrophotometer with a 1 cm cuvette, an absorbance of 0.70 was found. What is the concentration of compound X in the sample?You have analyzed an unknown sample that produces an absorbance of 0.372. The pathlength is 1 cm and the concentration in 2.1 M. What is the molar absorption coefficient of the sample? Show your calculation.?An oxygen-containing compound shows an absorption band at ~1700 cm-1 and no absorption bands at ~3300 cm-1, ~2700 cm-1 , or ~1100 cm-1 . What class of compound is it?
- What is the %T of a sample with an absorption value of 0.463 at 523 nmCalculate the HDI of each FM and propose 2structures for two molecules that are isomers.Specify what the indicated absorption (s) shouldbe to.a.C7H15NO with strong absorptions in 3400, 3270and 1670, 1390, and 1370 cm-1b. C6H10O with absorptions in 2065 (m), 1685 (f),1650 (m) and 970 (f) cm-1c. C9H12O, with absorptions in 1600 and 1500 and1245 cm-1.A standard containing 20 mg/mL of compound P is placed in a 1 cm cuvette. The absorbance of the standard is 1.20 at 600 nm. A sample containing Compound P has an absorbance of 0.50. What is the concentration of this sample?
- After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a student found that her best fit linear line for FD&C Red 40 was y = 2,681x + -0.002. Her Kool-Aid sample had an absorbance of 0.337. If 0.55 grams of Kool-Aid powder was used to prepare an 8-fl oz cup of her assigned flavor, what is the percent by mass of FD&C Red 40 in her 8-fl oz cup?Proteins A give maximum absorbance at 595 nm and its molar absorption is 27,8 M-1 cm-1. If there is a measurement of a protein A 0,442 at 595 nm what is its concentration? (Spectrophotometer path length, 1cm).A specific steroid has a λmax of 249 nm and a molar absorptivity ε of 11,500 L mol−1 cm–1. What is the concentration of the compound in a solution whose absorbance at 249 nm is A = 0.050 with a sample pathlength of 1.00 cm?
- a. An oxygen-containing compound shows an absorption band at ~1700 cm-1 and no absorption bands at ~3300 cm-1, ~2700 cm-1, or ~1100 cm-1. What class of compound is it? b. A nitrogen-containing compound shows no absorption band at ~3400 cm-1 and no absorption bands between ~1700 cm-1 and ~1600 cm-1 or between 2260 cm-1 and 2220 cm-1. What class of compound is it?What major IR absorptions are present above 1500 cm−1 for attached compound ?The absorption coefficient of rhodopsin at 496 nm is 40,000 M-1cm-1. If you have a 1M solution of rhodopsin, how many times will you dilute the solution so that the diluted solution will give you an absorption reading at 496 nm that is in the range of 0.1-1.0. And what will be the absorption by the diluted solution?
