To convert from atoms of carbon to moles of carbon, you need to divide the number of atoms by Avogadro's number (6.022 x 10^23 atoms/mol).

So, 6.55 x 10^24 atoms of carbon is equal to:

(6.55 x 10^24 atoms of carbon) / (6.022 x 10^23 atoms/mol) = 10.87 mol of carbon

Therefore, 6.55 times 10 to the 24th power atoms of carbon is equal to 10.87 moles of carbon.