the specific rotation

You measure that the %T of a sample at 450 nm is 11%. What is the absorbance of this sample?

Indicate the expression that relates the angle of rotation of an optically active substance to its rotational power if the length of the measurement cell is 1. A) α = [a],0 c B) acλ = [a]Ⓡ C) a/ [a] = c D) a= [a]

I need help finding the absorbance.

Maria was tasked to determine the concentration of a Fe2(SO4)3 solution. She prepared 5 different standards of Fe2(SO4)3 using the table below as her guide. She ran the standards and the unknown solution through UV-VIS spectroscopy and recorded the absorbances of each solution.   HINT: use the dilution equation to determine the concentration of Fe2(SO4)3 in each test tube before preparing the standard curve. NOTE: No need to force the line to pass through zero. Just graph the data as is.   What is the slope of the line of the standard curve from the given data? What is the concentration of the unknown solution?

Of particle size techniques, which technique can identify the 3-D dimensions of the particles? O The Andreason pipette technique O The scanning Electron microscopy O Optical microscopy O The sieving method