Dear Chegg, I need help with following chemistry/math question about calculating

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Dear Chegg, I need help with following chemistry/math question about calculating the absorbance for following samples at wavelength (lambda) of 12.0, 12.5 and 13.0 nm:

I really need help with this question and hope someone can help me with it :)!

By using spectrophotometry, we can calculate the absorbance Attal A) at four different wavelength (given in nm) of a solution that contains four different substances called: p-, m-, o-xylene and ethylbenzene. The Beer-Lambrt law for a solution that contains several substances the absorbance Aotal(A) is given as In the following tabel/chart down below l-e, is given at different wavelenghts for each of the four different substances (in nm.) l. (in -for the following substances/samples) total mol Ethylbenzene 0.0408 0.0820 0.2933 0.3470 p-xylene m-xylene o-xylene 12.5 13.00 13.04 14.3 1.502 0.0261 0.0342 0.0340 0.0514 1.1516 0.0355 0.0684 0 0 2.532 0 0.1013 0.09943 0.2194 0.03396 Assume that the concentration is 0.1M for all four substances/compounds: p-, m-, o-xylene and ethylbenzene in the solution What is the absorbance A o)of following solution at 12.0, 12.5 and 13.0 nm? total

Explanation / Answer

A = lec , thus you have simply to multiply all le by c.

If all concentrations in a mixture are equal, then Atotal = c le

I don’t see any problem to calculate here.

But this question has a long list of wrong/strange/bizarre issues:

12-14 mn is a wavelenght range in far/vacuum UV/X-ray region, not used for analytical applications.

A=1.5 and 0.02 for only o.5 nm difference looks like in a line spectrum (but here the compunds are molecules, the transitions are typically electronic and the absoption bands are typically large in UV-VIS)

You have a calculated Atotal. Why you ask how to calculate it?

You can’t calculate A at a wavelenght (here 12 nm) using data from other wavelenghts by extrapolation

I think that this question is a fake, not a real problem.

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