Convert 2 mol of oxygen to atoms.

1.2044 × 10^24 oxygen atoms

Explanation:

To convert from moles to atoms, simply multiply the number of moles by Avogadro's number, 6.022 × 10^23

2 × 6.022 × 10^23

=1.2044 × 10^24

the answer for sodium is 0.186

the answer for rubidium is 0.251