Answer:
To calculate the number of moles of atoms in 4.2 × 10^23 atoms of magnesium (Mg), we can use Avogadro's number. Avogadro's number is the number of atoms, molecules, or ions in one mole of a substance, and it is approximately 6.022 × 10^23.
Given that there are 4.2 × 10^23 atoms of magnesium, we can find the number of moles using the following steps:
Step 1: Given the number of atoms, calculate the moles using Avogadro's number.
Number of moles = Number of atoms / Avogadro's number
Number of moles = 4.2 × 10^23 / 6.022 × 10^23
Number of moles ≈ 0.698 moles
Therefore, there are approximately 0.698 moles of magnesium atoms in 4.2 × 10^23 atoms. This calculation demonstrates how to convert a given number of atoms to moles using Avogadro's number, which is fundamental in chemistry for understanding and expressing the quantities of atoms and molecules.
