Iron oxide \(FeO\), crystallises in a cubic lattice with a unit cell edge length of 5.0 Å. If density of the \(FeO\) in …

Iron oxide \(FeO\), crystallises in a cubic lattice with a unit cell edge length of 5.0 Å. If density of the \(FeO\) in the crystal is \(4.0 g cm ^{-3}\), then the number of \(FeO\) units present per unit cell is______ (Nearest Integer)

Given: Molar mass of Fe and \(O\) is 56 and 16 g/mol respectively
\({N}_{A}=6.0\times {10}^{23}mo{l}^{-1}\)

[JEE Main 2023, 30 Jan (Shift 2)]