Iron (II) oxide has a cubic structure and each unit cell has side 5 Å. If the density of the oxide is 4 g cm^(-3), calculate the number of Fe^(2+) and O^(2-) ions present in each unit cell (Molar mass of FeO=72 g mol^(-1), N_A=6.02xx10^23 "mol"^(-1))

Iron (II) oxide has a cubic structure and each unit cell has side 5 Å

1.	Iron (II) oxide has a cubic structure and each unit cell has side 5 Å. If the density of the oxide is 4 g cm^(-3), calculate the number of Fe^(2+) and O^(2-) ions present in each unit cell (Molar mass of FeO=72 g mol^(-1), N_A=6.02xx10^23 "mol"^(-1))
Answer» ANSWER :Z=4, i.e., `4 FE^(2+)` and `4 O^(2-)` ION