[(Na_(2)SO_(4))],[" Determine the empirical formula of an oxide of iron which has "69.9%" iron and "30.1%],[" dioxygen by mass."]

Detennine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.

Determine the Empirical formulae of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.

Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% oxygen by mass.

Determine the empirical formula of an oxide of iron which contains 69.9% iron and 30.1% oxygen by mass.

Determine the empirical formula of an oxide of Iron which has 69.9% Iron and 30.1% dioxygen by mass. [Atomic mass of Fe=56, O=16 ]

Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% oxygen by mass. (Atomic mass : Fe = 55.85 amu, O = 16.00 amu).

Determine the empirical formula of an oxide in which mass percent of iron and oxygen are 69.9 and 30.1 respectively.

Determine the empirical formula (EF) of the oxide of chomium containing 68.4% Cr by mass.

The molecular formula of the oxide of iron in which mass percentage of iron is 69.9