The concentration of SO42- (aq) in a sample of river water can be determined using a precipitation titration in which a salt of Ba+ (aq) is the standard solution and BaSO4 (s) is the precipitate formed. What is the concentration of SO42- (aq) in a 53.5 mL sample if 6.05 mL of a 0.00100 M Ba2+ (aq) solution is needed to precipitate all the SO42- (aq) in the sample?