Answer
$x g/atom Cu = \frac{63.546 g Cu}{1 mol Cu}\times\frac{1 mol Cu}{6.022\times10^{23} atoms Cu}=1.055\times10^{-22} g/1 atom Cu$
Work Step by Step
1 mole of Cu = 63.546 grams
1 mole of Cu = $6.022\times10^{23}$ atoms Cu
Therefore:
63.546 grams Cu = $6.022\times10^{23}$ atoms Cu
