Answer:
1.05 x 10²²atoms
Explanation:
Given parameters:
Mass of Pb = 3.6g
Unknown:
Number of atoms in Pb = ?
Solution:
Some very essential constants;
1 mole of a substance contains 6.02 x 10²³atoms/mole
Molar mass of Pb = 207.2g/mol
First, we convert the mass to number of moles then to number of atoms.
Number of moles = [tex]\frac{mass(g)}{number of moles(g/mol)}[/tex]
3.6g x [tex]\frac{1}{207.2}[/tex] x [tex]\frac{g}{g/mol}[/tex] x 6.02 x 10²³ x [tex]\frac{atoms}{mole}[/tex] = 1.05 x 10²²atoms
