How many atoms are in 4.23 mol of pure aluminum

Question

How many atoms are in 4.23 mol of pure aluminum

Answer 1

1 mole of anything is 6.022x10²³ items. So 1 mole of pure aluminum has 6.022x10²³ atoms in it. That means 4.23 moles will have (4.23)(6.022x10²³) atoms or 25.47 x 10²³ atoms or 2.547 s 10²⁴ atoms. Rounding to the proper number of sig figs, 4.23 moles of pure aluminum has 2.55 x 10²⁴ atoms in it.