–a 395.6 mg sample of primary standard arsenic oxide is dissolved in 25.00 ml of acid,

a 395.6 mg sample of primary standard arsenic oxide is dissolved in 25.00 ml of acid, forming two molecules of h3aso4 for each molecule of as2o3 (FM 197.84). a) calculate the molarity of h3aso3. b) calculate the normality of the h3aso3 (for oxidation to h3aso4)