If the pH is 9 what is the concentration of hydroxide ion [OH]? (hint: find the pOH first)

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

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.

Are oil and water a mixture or solution