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 |
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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 |
Follow me...
|