 |
||||
    |
||||
Answer |
||||
|
How many atoms of lead are found in a 2 mg sample? Reason it through carefully:
The atomic mass of lead is 210 therefore 210g lead contains NA atoms of lead 1 g lead contains NA/210 atoms 2 mg lead contains (NA/210) x 2 x 10-3 atoms = 5.7 x 1018 atoms |
||||
 |
 |
|||
