Question

5.07 x 10^24 atoms of antimony is how many moles?

8.98 mol
7.99 mol
4.82 mol
8.42 mol

Answer 1

8.42 moles.


so the answer is 8.42

Answer 2

Answer:

8.42 moles (3 sig. figs.)

Explanation:

Given 5.07 x 10²⁴ atoms of antimony (Sb) => ? moles Sb

1 mole of any substance contains 6.02 x 10²³ particles ( atoms or molecules)

∴ Think in terms of 'how many 6.02 x 10²³'s are in 5.07 x 10²⁴ atoms Sb?

That is => moles Sb = 5.07 x 10²⁴ atoms Sb / 6.02 x 10²³ atoms Sb/mole Sb

= 8.42192691 moles Sb (calculator answer) ≅ 8.42 moles (3 sig. figs.)