Detennine the empirical formula 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% dioxygen by mass.

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