Question

How many moles of gold (Au) are in 5.9 × 10−10 g of gold

Answer 1

Molar mass of gold ( Au) is 197 grams per mole (approximately).

Hence, 5.9 * 10^-10 grams of gold will have 5.9 * 10^-10/197 moles of Au in it.

5.9/197 * 10^-10 moles of Au.

0.03 * 10^-10 mol of Au  (approximately)