Find the number of moles of carbon in 20g.

Question

I have this question for my chemistry homework and not sure what to do here. The next question is:

How many carbon atoms are there in the previous question?

Answer 1

20 g C x 1 mole C/12 g = 1.7 moles of C

1.7 moles C x 6.02x10²³ atoms/mole = 1.0x10²⁴ carbon atoms