lucybrenengen lucybrenengen
  • 03-01-2018
  • Chemistry
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how many moles are in 2.31*10^21 atoms of lead

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Willchemistry
Willchemistry Willchemistry
  • 03-01-2018
Hey there!:

Molar mass Lead  ( Pb ) = 207.2 g/mol

Therefore:

1 mole Pb --------------------- 6.02*10²³ atoms
? moles Pb -------------------- 2.31*10²¹ atoms

moles Pb = ( 2.31*10²¹ ) * 1 / ( 6.02*10²³ ) = 

moles Pb = ( 2.31*10²¹ ) / ( 6.02*10²³ ) = 

=> 0.00383 moles of Pb

Hope this helps ! 
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