6. Chemical Quantities & Aqueous Reactions

If you have 5 mL of a solution with a molarity of 1.2×10⁻⁵ M and add 0.976 g of bleach with a density of 1.08 g/mL, what is the initial concentration of the hypochlorite ion (OCl⁻) in the reaction?

What volume in mL of 2.89 M Co(NO3)3 stock solution is needed to make 2.67 L of a solution with a nitrate ion concentration of 0.0148 M?