To calculate the mass of 1.0 mole of magnesium, you need to know the molar mass of magnesium. The molar mass of an element is the mass of one mole of that element, and it is expressed in grams per mole (g/mol).
The atomic mass of magnesium (Mg) is approximately 24.305 atomic mass units (amu). This value can be found on the periodic table. Since the molar mass is numerically equal to the atomic mass in amu, the molar mass of magnesium is also 24.305 g/mol.
Therefore, the mass of 1.0 mole of magnesium is:
Mass = Number of moles × Molar mass
Substituting the values:
Mass = 1.0 mole × 24.305 g/mol = 24.305 grams
So, the mass of 1.0 mole of magnesium is 24.305 grams.