why is it generally preferable to use absorbance as a meaure of absorption rather than transmittance?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

To calculate the molarity of a solution, you need to know the moles of solute and the

Determine type of reaction & predict the product c3h12+o2 =