Potassium dichromate (K_(2)Cr_(2)O_(7)) is an orange coloured compound, very frequently used in laboratory as an oxidising agent as well as in a redox titration. It is generally prepared from chromit (FeCr_(2)O_(4))ore according to the following reactions: (a) Fusion of chromite ore with sodium carbonate in excess of air. FeCr_(2)O_(4)+Na_(2)CO_(3)+O_(2) to Na_(2)CrO_(4)+Fe_(2)O_(3)+CO_(2) (b) Acidifying filetered sodium chromate solution with sulphuric acid. Na_(2)CrO_(4)+H_(2)SO_(4) to Na_(2)Cr_(2)O_(7)+Na_(2)SO_(4)+H_(2)O (c) Treating sodium dichromate with potassium chloride. Na_(2)Cr_(2)O_(7)+KCl to K_(2)Cr_(2)O_(7)+NaCl Answer the following questions using above information. If whole of the chromite ore given in the previous question gets consumed and sufficient amount of rest of the reactants are given, then the mass of K_(2)Cr_(2)O_(7) obtained is :