The reagent pcc in dry methylene chloride is successful in the selective oxidation of primary alcohols to aldehydes because

a. pcc is a relatively weak oxidizing agent
b. primary alcohols cannot oxidize any further
c. hydration of the intermediate aldehyde is unable to take place in dry methylene chloride
d. methylene chloride is a reducing agent
e. none of these choices

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

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.

One similarity and one difference between an element and a mixture of elements