Final answer:
To find the number of atoms in 1.22 moles of magnesium, you multiply the moles by Avogadro's number, resulting in 7.35 × 10²³ atoms. So, the correct answer is D.
Step-by-step explanation:
The question asks how many atoms are in 1.22 moles of magnesium. We know that one mole of any substance contains Avogadro's number of particles, which is 6.022 × 10²³ particles/mol. To find the number of atoms in 1.22 moles, we simply multiply the number of moles by Avogadro's number:
1.22 moles × 6.022 × 10²³ atoms/mol = 7.35 × 10²³ atoms
Therefore, the correct answer is D. 7.35 × 10²³ atoms.