1. Avogadro's Number
Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's a fundamental constant:
* Avogadro's Number (N_A) = 6.022 x 10^23 particles/mole
2. Calculation
To find the number of atoms, we multiply the number of moles by Avogadro's number:
* Number of atoms = (moles of Pb) * (Avogadro's Number)
* Number of atoms = (6.755 moles) * (6.022 x 10^23 atoms/mole)
* Number of atoms ≈ 4.07 x 10^24 atoms
Therefore, there are approximately 4.07 x 10^24 atoms in 6.755 moles of lead.
