The molar mass of copper is 63.55 g/mol. To find out how many moles of copper are in 39 grams of copper, we just need to divide the amount given by the molar mass.
So, 39 g / 63.55 g/mol = 0.614 moles of copper.
Therefore, there are 0.614 moles of copper in 39 grams of copper.