All of the following are principles of the cell theory except (a)all living things are made of one or more cells (b)the cell is the smallest unit of life (c) water is the main ingredient in every cell (d) all new cells come from preexisting cells explain why

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.