J.R. S. answered 09/22/19
Ph.D. University Professor with 10+ years Tutoring Experience
Is it 8.25% by mass or volume? Let us assume it’s by mass. Then we have 8.25 g/100 ml = 82.5 g Liter. The molar mass of NaOCl is 74.4 g/mole.
82.5 g/L x 1 mole/74.4g = 1.11 mole/L = 1.11 M

J.R. S.
09/23/19
Emily G.
I forgot to mention the unit is (weight/volume percent)09/23/19