The number of Zn particles (atoms of Zn ) in the first sample, and Zn ions are going to be the same, Also mass of Zn are going to be the same, because of electrons are too small, and would not have influence on mass.
In this case, if we analyze these two situations via stoichiometry, we are going to realize there is 1 mol of zinc in both of them as shown below:
This is substantiated by knowing there is only one zinc atom in the zinc chloride, therefore, one mole is found as well as in the zinc granules which is just pure zinc.
Mass=volume x density if we have mass and density we can calculate volume using the formula: volume=mass/density volume of the displaced water = 600g/19.3g/cm3 volume = 31.09cm3
