What is the percent transmittance (%) if the absorbance (A) is 0.774? Show your solution

How would I do 2? the concentration iron is 1.85mg/vitamin tablet, and the absorbance at 508nm is 0.37

A colored ion solution has a concentration of 0.200 M with a measured absorbance A = 0.880. Another ion solution made of the same chemicals has an absorbance A = 0.172. What is the concentration of this unknown sample solution?

A calibration curve was created to determine the quantity of protein in a solution. The calibration curve has the form of a straight line with the equation ?=0.0182?+0.007 where ? is the corrected absorbance of the solution and ? is quantity of protein in the solution in units of micrograms (μg). Determine the quantity of protein in a solution that has an absorbance of 0.305. A blank solution has an absorbance of 0.060. The answer (Quantity of protein) should be in units of (μg)

A solution of a dye was analyzed by spectrophotometry, and the following calibration data were collected using a 1 cm cuvette. *graph in attachemnt*   Using the calibration data above for the dye solution, what is the dye concentration in a solution with an absorbance (A) = 0.52 if it was measured in a 1 cm cuvette?   Group of answer choices 3.0 x 10-6 M 6.0 x 104 M 2.0 x 10-6 M Not enough information is provided.

Test Tube Number Cobalt Chloride Concentration    (mol/mL) Absorbance at 510 nm       1 0.000 0.000 2 0.009 0.042 3 0.018 0.92 4 0.027 0.139 5 6 0.036 0.045 0.190 0.236   7   (Unknown)   0.151     1. what is the concentration of unknown cobalt chloride solution? 2. why is the absorbance at the absorption peak ?

explain what the results of this experiment are and the purpose Table 2   Absorbance vs CoCl2 concentration   Test Tube Number Cobalt Chloride Concentration    (mol/mL) Absorbance at 510 nm       1 0.000 0.000 2 0.009 0.024 3 0.018 0.055 4 0.027 0.085 5 6 0.036 0.045 0.112 0.138   7   (Unknown)   0.088