What mass of calcium metal contains the same number of atoms as 12.16 g of magnesium

20.268 grams of calcium metal contains the same number of atoms as 12.16 g of magnesium.

Explanation:

Atomic mass of magnesium= 24 g/mol

Mass of magnesium given = 12.16 g

Moles of magnesium=

1 mol = atoms/ molecules, ions

Number of atoms of magnesium in 0.5067 moles of magnesium:

Calcium metal contains the same number of atoms:

Moles of calcium = n

n = 0.5067 mol

Atomic mass of calcium = 40 g/mol

Mass of 0.5067 moles of calcium:

0.5067 mol × 40 g/mol = 20.268 g