Final answer:
To calculate the density of FeO with a rock salt crystal structure, we need to find the radius of Fe and assume a spherical nucleus. Then, we can calculate the volume and divide the mass by the volume to find the density.
Step-by-step explanation:
The density of FeO can be calculated by assuming the nucleus is spherical and then finding its density using the formula p = m/V. First, we need to find the radius of Fe using the formula r = RoA^(1/3), where A is the atomic mass of Fe. Since Fe has an atomic mass of 56, we can calculate its radius. Once we have the radius, we can calculate the volume of the nucleus using the formula V = (4/3)πr^3. Finally, we divide the mass of FeO by the volume to get the density in units of u/fm³. We then convert this to kg/m³ by multiplying by the conversion factor.