The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an oxidizing agent. A 6.55-g sample of stibnite, antimony, is dissolved in hot, concentrated HCl (aq) and passed over a reducing agent so that all the antimony is in the form Sb^3+ (aq). The Sb^3+ (aq) is completely oxidized by 31.0 mL of a 0.120 M aqueous solution of KBrO_3(aq). The unbalanced equation for the reaction is BrO^-_3 (aq) + sb^3+'(aq) rightarrow Br^-(aq) +sb^5+ (aq) (unbalanced) Calculate the amount of antimony in the sample and its percentage in the ore.