Answer:
27.08 x 10²³ atoms of Al .
Step-by-step explanation:
121.4 grams of Aluminum = 121.4 / 26.98 moles of Aluminum
= 4.4996 moles
1 mole of Aluminum contains 6.02 x 10²³ atoms of Al
4.4996 moles of Aluminum contains 6.02 x 10²³ x 4.4996 atoms of Al
= 27.08 x 10²³ atoms .