The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent. A 7.23 g sample of stibnite, an ore of antimony, is dissolved in hot, concentrated HCl(aq) and passed over a reducing agent so that all the antimony is in the form Sb3+(aq). The Sb3+(aq) is completely oxidized by 37.3 mL of a 0.110 M aqueous solution of KBrO3(aq). The unbalanced equation for the reaction is BrO−3(aq)+Sb3+(aq)⟶Br−(aq)+Sb5+(aq) (unbalanced)

Calculate the amount of antimony in the sample and its percentage in the ore.

mass of antimony:
g
percentage of antimony:
%