a) A solid sphere of a metal with a mass of 0.7371kg has a diameter of 50.0mm. Calculate the density of metal.
b) Calculate the moles of FeSO4 present in an iron tablet containing 400mg FeSO4.
c) Zinc has a density of 446 lb/ft^3. What is the density of zinc in g/cm^3?
d) Calculate the number of protons, neutrons and electrons of 56^Fe^2+