Answer
Zinc= 3.3x10^24
Copper = 5.7x10^24
Work Step by Step
Total mass = Density x volume
8.48x112.5=954 grams
multiply total mass by percent to find how much zinc weighs and how much copper weighs.
.37x954=352.98g Zn
(.100-.37)954=601.02g Cu
find the moles of each compound
601.02/63.55= 9.46
Multiply moles by 6.022x10^23 for the amount of atoms = 5.7x10^24 atoms of Cu
Do the same for zinc, 352.98/65 38 =5.4 Mol
5.4x 6.022x10^23=3.3x10^24
