To determine the number of atoms in a given amount of a substance, you can use Avogadro's constant, which is approximately 6.022 x 10^23 atoms per mole.
Given that you have 0.34 moles of magnesium, you can calculate the number of atoms using the following formula:
Number of atoms = (Number of moles) x (Avogadro's constant)
Substituting the values:
Number of atoms = 0.34 mol x 6.022 x 10^23 atoms/mol
Calculating:
Number of atoms = 2.04868 x 10^23 atoms
Therefore, there are approximately 2.04868 x 10^23 atoms in 0.34 moles of magnesium.