32.1 g of dinitrogen pentoxide reacts with an excess of water. How many moles of nitric acid are produced HEL I NEED TO GRADUATE!!

This is a mixture that has the same composition throughout.

What happens to the atomic radius when an elctron is lost

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.