Well one mole of carbon specifies 6.022×1023 INDIVIDUAL carbon atoms, i.e. a mole of carbon.........
Explanation:And thus we take the quotient.......
1.35×1024⋅C⋅atoms6.022×1023⋅C⋅atoms⋅mol−1=2.24⋅mol
And what mass of carbon does this molar quantity represent? You should be able to answer pdq.