If the pOH of a nitric acid (HNO3) solution is measured as 11, what is the concentration of HNO3 solution? 2 × 10-3 M
1 × 10-3 M
1 × 10-11 M
3 × 10-3 M

1 gram of HNO3 will be equal to 1/63.01 moles. Therefore, we can say that 1 liter of Nitric acid contains 15.6976 moles or in other words molarity of 70% (w/w) Nitric acid is equal to 15.6976 M.

Known values  

Molecular weight of HNO363.01 g/mole

Concentration of Nitric acid70% (% by mass, wt/wt)

a is the answer to this question

explanation:

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.