Answer:
30 g of Au have the same number of atoms as 10 g of Zn
Explanation:
Molar mass Au: 196.97 g/m
Molar mass Zn: 65.41 g/m
10 g of Zn are (mass / molar mass) = 0.153 moles
(10 g / 65.41 g/m)
And now let's count the atoms in this amount of Zn ( mol . NA)
0.153 m . 6.02×10²³ = 9.20×10²² atoms of Zn
In which mass of Au, will we have, these quantity of atoms.
So 9.20×10²² atoms are contained in 0.153 moles.
Then, let's convert the moles in mass (mol . molar mass) to get the answer.
0.153 m . 196.97 g/m = 30.1 g
