A compund contains 63% manganese and 37% oxygen. a) What is its emperical formula? B) If...

A compund contains 63% manganese and 37% oxygen.

a) What is its emperical formula?

B) If its molecular weight is 174, what is its molecular formula?

Expert Solution

Element % A.Wt relative number simple ratio

Mn 63 55 63/55 = 1.145 1.145/1.145 = 1

O 37 16 37/16 = 2.3125 2.3125/1.145 = 2

The empirical formula is MnO2

The empirical formula weight (E.F.Wt) = 55+ 16*2 = 87

molecular frmula = ( empirical formula) n

n = M.Wt/E.F.wt = 174/87 = 2

molecular formula = ( MnO2)2 = Mn2O4

queen_honey_blossom answered 2 years ago

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