Calculate the number of atoms of gold from one gram of gold

Atomic mass of gold = 196.96g/mol

Given mass of gold = 1g

So, number of moles of gold in 1g = given mass / atomic mass = 1 / 196.96 = 0.0050 moles

Number of atoms of gold in 1 mole of gold = Avogadro number = 6.023*10²³

So, number of atoms in 0.0050 moles = 6.023*10²³ * 0.0050 = 3.057*10²¹atoms

Therefore 1g of gold has approximately 3.057 * 10²¹ atoms.