Understanding the Concepts

* Avogadro's Number: One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.). This is known as Avogadro's number.

Calculation

1. Set up the conversion factor:

(1 mole Cu / 6.022 x 10^23 atoms Cu)

2. Multiply the number of atoms by the conversion factor:

(148 x 10^25 atoms Cu) x (1 mole Cu / 6.022 x 10^23 atoms Cu)

3. Cancel out the units of atoms, leaving you with moles:

= 246 moles Cu

Therefore, there are approximately 246 moles of Cu in 148 x 10^25 atoms.