Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. for example, a solution of hydrogen peroxide, h2o2, can be titrated against a solution of potassium permanganate, kmno4. the following equation represents the reaction:
2kmno4(aq)+h2o2(aq)+3h2so4(aq)→3o2( g)+2mnso4(aq)+k2so4(aq)+4h2o(l)

a certain amount of hydrogen peroxide was dissolved in 100. ml of water and then titrated with 1.68 m kmno4. what mass of h2o2 was dissolved if the titration required 15.3 ml of the kmno4 solution?

express your answer with the appropriate units.