How many atoms are in 2.70 moles of iron (fe) atoms?
4.48 × 10-24 atoms fe
1.63 × 1024 atoms fe
2.23 × 1023 atoms fe
6.02 × 1023 atoms fe

Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance:

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.