Molar and molecular weight of Mg2Si

• Relative molecular weight of Mg2Si: 76.6955
• Molar mass of Mg2Si: 76.6955 g/mol (0.0767 kg/mol)

Calculation of the relative molecular and molar mass of Mg2Si

• Mr[Mg2Si] = Ar[Mg] * 2 + Ar[Si] = 24.305 * 2 + 28.0855 = 76.6955
• Molar mass (kg/mol) = Mr[Mg2Si] : 1000 = 76.6955 : 1000 = 0.0767 kg/mol

Mg2Si: percent composition by element

• Magnesium (Mg) = 48.61 : 76.6955 * 100 = 63.381 %
• Silicon (Si) = 28.0855 : 76.6955 * 100 = 36.619 %

Molar mass calculator