Molar and molecular weight of MgSe

• Relative molecular weight of MgSe: 103.265
• Molar mass of MgSe: 103.265 g/mol (0.10327 kg/mol)

Calculation of the relative molecular and molar mass of MgSe

• Mr[MgSe] = Ar[Mg] + Ar[Se] = 24.305 + 78.96 = 103.265
• Molar mass (kg/mol) = Mr[MgSe] : 1000 = 103.265 : 1000 = 0.10327 kg/mol

MgSe: percent composition by element

• Magnesium (Mg) = 24.305 : 103.265 * 100 = 23.537 %
• Selenium (Se) = 78.96 : 103.265 * 100 = 76.463 %

Molar mass calculator