The mass of an atom of lead on=202

Asked by Shrinivasdangi07 | 21st Mar, 2019, 10:34: PM

Expert Answer:

1 mole of Pb contains Avogadro's number of atoms.
 
Therefore,
 
1 mole of Pb = 6.022 × 1023 
 
1 mole of Pb = Molar mass of Pb
 
Molar mass of Pb = 202
Now,
Mass space of space an space atom space of space Pb space equals fraction numerator 202 over denominator 6.022 cross times 10 to the power of 23 end fraction

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 3.35 cross times space 10 to the power of negative 22 end exponent space space straight g.
 
The mass of a Pb atom is 3.35 × 10−22 gm.

Answered by Varsha | 22nd Mar, 2019, 12:51: PM