Calculating Number of Atoms Given Mass
Problem
Calculate the number of atoms in 200 g of gold.
Solution
General Equation:
Number of atoms =
(mass of element)*(
Avogadro's number
)
atomic mass of element
Number of gold atoms =
(200g)*(6.02 x 10
23
atoms/mol)
196.97 g/mol
=
6.11 x 10
23