Question

How many atoms are there in 5.10 moles of sulfur?

Answer 1

To determine the number of atoms in 5.10 moles of sulfur, we just have to multiply the given number of moles by the Avogadro's number. That is,
                                (5.10 moles) x (6.022 x 10^23 atoms / mole)
                                           = 3.07 x 10^24 atoms
Thus, there are approximately equal to 3.07 x 10^24 atoms of sulfur gas. 

Answer 2

1 mole ------------- 6.02 x 10²³ atoms
5.10 moles -------- ( atoms sulfur )

atoms sulfur = 5.10 x ( 6.02 x 10²³ ) / 1

atoms sulfur = 3.07 x 10²⁴ / 1

= 3.07 x 10²⁴ atoms of sulfur

hope this helps!