Part 1:

Question

Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ?
2030000000000000000000 was the correct answer
Part 2:
How many atoms of N do you have ?

Answer 1

I found this answer, thank you :)

Answer 2

See your original post below for a note.