Answer:
There are 0,75 moles of Magnesium.
Explanation:
We use Avogadro's number, according to which in 1 mole of any substance there are 6,023 x 10 e23 particles (example: atoms, molecules). We calculate the number of moles according to the following simple three rule:
6,023 x 10 e23 atoms-----1 mol of Magnesium
4.5 x 10e23 atoms----x=
x=(4.5 x 10e23 atoms x1 mol of Magnesium)/6,023 x 10 e23 atoms
x=0,75 moles of Magnesium
