First we need to convert the given atoms of Mg to units
of moles. To do this, we divide the given with the Avogadros number.
Moles of Mg = number of atoms / Avogadro’s number
Moles of Mg = 2.01 x 10^10 atoms / (6.022 x 10^23 atoms /
mol)
Moles of Mg = 3.33776 x 10^-14 mol Mg
Then we convert moles to mass by multiplying with the
Molar mass. Molar mass of Mg = 24.305 g / mol
Mass of Mg = Moles of Mg * Molar mass of Mg
Mass of Mg = 3.33776 x 10^-14 mol * 24.305 g / mol
Mass of Mg = 8.11 x 10^-13 g
