Here's how to calculate the number of atoms in 5.6 moles of gold:

1. Avogadro's Number

* Avogadro's number states that one mole of any substance contains 6.022 x 10²³ particles (atoms, molecules, etc.).

2. Calculation

* Step 1: Multiply the number of moles of gold by Avogadro's number:

5.6 moles Au * (6.022 x 10²³ atoms/mole) = 3.37 x 10²⁴ atoms Au

Answer: 5.6 moles of gold contain approximately 3.37 x 10²⁴ atoms of gold.