The first end point volume (phenolphthalein endpoint) is 11.60 mL and the second end point volume (bromocresolgreen end point) is 41.93 mL. A sample weighing 0.3375 g and containing Na2CO3 (106.0 g/mol), NaHCO3 (84.01 g/mol), and inert material is dissolved and titrated with0.1014 M HCl. Determine the weight percentages of NaHCO3 and Na2CO3.