9. What volume of mercury in milliliters is produced when 591.0g of mercury (II) oxide decomposes? (density of mercury = 13.6g/mL)
2HgO --> 2Hg + O2

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.

Which factor is likely to impact the possible number of compounds ?

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?