Here's how to calculate the number of atoms in 1.85 moles of Fe:

1. Avogadro's Number:

* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's approximately 6.022 x 10²³ particles/mol.

2. Calculation:

* Multiply the number of moles by Avogadro's number:

1.85 moles Fe * (6.022 x 10²³ atoms/mol) = 1.11 x 10²⁴ atoms of Fe

Therefore, there are approximately 1.11 x 10²⁴ atoms in 1.85 moles of iron (Fe).