The activity series shows that solid chromium will be oxidized to form
A. chromium 3+ ion
B. chromate ion
C. nothing
D. chrome

Iknow #2 is d. i just need to know why

What is the name of this hydrocarbon?

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.