Ctivity/4/5/2/assessment
DG
L
4.5.2 Test (CST): Computer-Scored Unit Test
Question 20 of 25
2 Points
The products of a reaction are NaCl and H. O. What does the law of
conservation of matter reveal about the reactants in the reaction?

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.