A pure sample of barium hydroxide of m 8.03 g was dissolved and diluted to the mark...?

A pure sample of barium hydroxide of m 8.03 g was dissolved and diluted to the mark in a 250 mL volumetric flask. It was found that 8.59 mL of this solution was needed to reach the stoichiometric point in a titration of 26.9 mL of a nitric acid solution. 1/ Calculate the molarity of the HNO3 solution. Answer in units of M. 2/ What m of HNO3 was in the sample that was titrated with aqueous barium hydroxide? Answer in units of g.