Exercise 5 | The periodic table and Chemical Periodicity

Find the empirical formula of a compound containing 1.92 grams of Mn and 1.12 grams of oxygen.

nMn = mMnMMn = 1.9254.94 = 3.49 x 10-2 g.mol-1

nO = mOMO = 1.1216.0 =  7.00 x 10-2 g.mol-1

nMn = 2 nO, the empirical formula of this compound is MnO2