An unknown volume of milk is measured partly using a 100 ml jar that has 1 ml of uncertainty in each measurement, and the rest of the volume is measured using a 10 ml flask that has 0.5 ml of uncertainty in each measurement. The milk filled the 100 ml jar 3 times and filled the 10 ml flask 4 times. What is the measured volume, in ml, with uncertainty

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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 percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %