Question

A dilution is made during the preparation of a reaction mixture. The compounds are: 2.00 ml of 0.325 KMnO4, 7.50 ml of 0.155 M Oxalic acid, and 10.00 ml of H2O. What are the final concentrations of the compounds?

Answer 1

compute moles of each, eg
molesKMnO4=.325*.002=...

now, with those moles computed, all all the volumes .002+.0075+.010 l, and divide each of the moles you found by the new total volume.