Answer:
3.793x10^21 atoms
Explanation:
If one mole has 6.022x10^23 particles (or atoms), 6.3x10^-3 mole has 3.793x10^21 atoms or particles.
[tex]\frac{1 mole}{6.022X10^23 atoms} = \frac{6.3x10^-3 mole}{?}[/tex]