Answer:
The answer to your question is below
Explanation:
Data
mass of Gold = 35.12 g
mass number of gold = 197 g (from the periodic table)
1.- To calculate the number of moles use proportions
197 g of gold ----------- 1 mol
35.12 g of gold -------- x
x = (35.12 x 1)/197
<u>x = 0.18 moles of gold</u>
2.- To calculate the number of atoms also use proportions and the Avogadro's number.
1 mol of gold ------------ 6.023 x 10 ²³ atoms
0.18 moles of gold ----- x
x = (0.18 x 6.023 x 10²³) / 1
<u> x = 1.084 x 10²³ atoms</u>
