Question

calculate the mass of 1 atom of carbon

Answer 1

yup here is the answer for u
This way you can calculate the mass of the carbon atom

Avogadro's number is 6.02214129×1023 and represents the number of carbon-12 atoms in 12 grams of unbound carbon-12 in the ground electronic state.

12 grams/6.02214129×1023=1.9926467×10−23grams

The unified atomic mass unit (u) is 1.660538921×10−24 grams

12×1.660538921×10−24 grams =1.9926467×10−23grams

Answer 2

hope my answer would help you