Answer:
Mass = 68.376 g
Explanation:
Given data:
Mass of lead = ?
Number of atoms of lead = 2.01 ×10²³ atom
Solution:
Number of moles of lead:
1 mole of lead contain 6.022×10²³ atom
2.01 ×10²³ atom × 1 mol /6.022×10²³ atom
0.33 mol
Mass of lead:
Mass = number of moles × molar mass
Mass = 0.33 mol × 207.2 g/mol
Mass = 68.376 g
