solution of Tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm length cuvette. Given the absorbance coefficient of trp is 6.4 x 103 Lmol-1cm-1. What is the concentration of solution? The answers are as follows A)0.17x10-3mol/L B)2.57x10-3mol/L C)0.17x10+3mol/L D)2.57x10+3mol/L
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A solution of Tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm length cuvette. Given the absorbance coefficient of trp is 6.4 x 103 Lmol-1cm-1. What is the concentration of solution?
The answers are as follows
A)0.17x10-3mol/L
B)2.57x10-3mol/L
C)0.17x10+3mol/L
D)2.57x10+3mol/L
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- A solution of Tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm length cuvette. Given the absorbance coefficient of trp is 6.4 x 103 Lmol-1cm-1. What is the concentration of solution?A solution of Tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm length cuvette. Given the absorbance coefficient of trp is 6.4 x 103 Lmol-1cm-1. What is the concentration of solution? The options are as follows A) 0.17 x10-3 mol/L B)2.56x10-3mol/L C)0.17x10+3mol/L D)2.56x10+3mol/LCalculate the molar absorptivity of a solute when its measured absorbance is 1.050 with a concentration of 1.45 x 10-3 M. Assume the path length of the cell is 1.0 cm.
- Q3) A solution of Tryptophan has an absorbance at 280 nm of 0.25 in a 0.5 cm length cuvette. Given the absorbance coefficient of Tryptophan is 6.4 × 103 L Mol-1 cm-1. What is the concentration of solution?A standard curve for glucose analysis was prepared.The slope (m) was found to be 1.341 while the y-intercept (b) was -0.333. Calculate the concentration (x) of glucose having an absorbance (y) of 0.151. 0.067 0.361 0.858 0.136Preparing a standard curve. 1. determine the absorbance max of [FeSCN]2+ it is 448.1 2. determine the concentration of FeSCN2+ in the stock solution. M1V1=M2V2 stock solution: ~0.200 M iron (iii) nitrate in 1M nitric acid intial volume: 0.3mL final volume: 10.3mL volume: 10mL ~0.002M potassium thiocyanate initial volume: 0.3mL final volume: 10.3mL volume: 10mL not sure if this is needed stock solutions: ~0.200M iron (iii) nitrate in 1M nitric acid: 0.207M ~0.002M iron (iii) nitrate in 1M nitric acid: 0.00209M ~0.002M potassium thiocyanate: 0.00193M
- The absorbance value for the Standard was 0.625 and [FeSCN^ 2+ ] std is 2.00E 4M Calculate the [FeSCN^ 2+ ] in the equilibrium mixture, report the answer to the correct significant figures. The absorbance of the equilibrium solution was 0.451A solution of a dye with an absorptivity coefficient (ε) of 3.75 x 102 M-1cm-1 had an absorbance of 0.039 measured in a cell whose width is 1.00 cm. What is the concentration of the dye in the solution? a. 1.46 x 10-3 M b. 1.04 x 100 M c. 1.04 x 10-4 M d. 1.46 x 101 MSolution. Vol. of A solution (mL) [methyl red], M Absorbance 1 10.00 _1.64 x10^-16_ _0.256_ 2 15.00 _2.45 x10^-16_. _0.373_ 3 20.00 _3.27 x10^-16_. _0.486_ 4 25.00 _4.09 x10^-16_. _0.620_ Plot a graph of the absorbance (y axis) as a function of the concentration of methyl red (x axis). What is the slope of the graph?
- A solution of tryptophan has an absorbance of 0.64 at 280 nm. Given with of 6.04 x 103 Msolution of tryptophan and path length of 0.5 cm. What is the molar absorptivity oftryptophan?The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.4150.415 . The slope-intercept form of the equation of the line is ?=4558.4?+0.0147y=4558.4x+0.0147 . The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe3+Fe3+ concentration of the unknown solution?The absorbance values at 250nm of 5 standard solutions, and sample solution of a drug are given below: Conc. (ug/ml) A 250 nm10 0.16820. 0.32930 0.50840. 0.66050 0.846Sample. 0.661Calculate the concentration of the sample