What is the pH if the concentration of OH ions is 2.7 x 10-3M? (Hint: This is a two- part question).

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg