To find the number of moles in 4.50g of Zn, we need to use the molar mass of Zn which is 65.38 g/mol.
First, we can calculate the number of moles using the formula:
moles = mass / molar mass
Substituting the given values, we get:
moles = 4.50 g / 65.38 g/mol
moles = 0.0689 mol
Therefore, there are 0.0689 moles in 4.50g of Zn.