Find the mass of 3.65 x 10^-2 mol K2SO4

6 g

Explanation:

174.26  g   m o l^-1  −   ×  3.65  ×  10  − 2  m o l  =  ? ? g

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

a corroding iron, if that's one of your choices