The halogens are the elements of group 17 on the periodic table. Halogens combine easily with elements from group 1. When a halogen reacts with a metal, what type of compound is formed? A.
potassium
B.
salt
C.
noble gas
D.
alloy

Consider this initial-rate data at a certain temperature for the reaction described by

In which reaction is precipitation occurring?

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.