Asap.
what is the reaction to produce iron from iron oxide:
a) decomposition
b) oxidation
c) reduction

Summarize possible ways in which phases of matter could combine to form a solution.

Name the intersection of plane bpq and plane cpq.

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.