Respuesta :

12M HNO3

Explanation:

A 600-ml solution of 16M nitric acid contains

16M HNO3 × 0.6 L = 9.6 m HNO3

so by increasing the volume by 200 ml the molarity of the solution becomes

Molarity = (9.6 mol HNO3)/(0.800 L)

= 12M HNO3