A 16.95 g sample of sugar was added to a glass with a mass of 8.30 oz. What is the combined mass of the glass and the sample in ounces (oz.), grams (g), and milligrams (mg)? Show your work and
express your answers to the correct number of significant figures.

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.