Respuesta :

jcherry99

Answer:

Explanation:

1 mol of Mg = 6.02 * 10^23 ions of magnesium

x = 1.25 * 10^23 ions of magnesium

1/x = 6.02 * 10^23/1.25 * 10^23         Cross multiply

x*6.02 * 10^23 = 1 * 1.23 * 10^23       Divide by 6.02*10^23

x = 1.25 * 10^23 / 6.02*10^23

x = 0.208 mols