A(n) is an organic compound in which a carbonyl group is bonded to a nitrogen atom. (2 points) ester aldehyde amide ketone

What is the independent variable in this investigation? mass volume sample number substance density

Which statement best explains the relationship between an area is geography and the temperature of its surface water

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.