Molar and molecular weight of MgI2

• Molecular formula: MgI2 or I2Mg
• Relative molecular weight of MgI2: 278.11394
• Molar mass of MgI2: 278.11394 g/mol (0.27811 kg/mol)

Calculation of the relative molecular and molar mass of MgI2

• Mr[MgI2] = Ar[I] * 2 + Ar[Mg] = 126.90447 * 2 + 24.305 = 278.11394
• Molar mass (kg/mol) = Mr[MgI2] : 1000 = 278.11394 : 1000 = 0.27811 kg/mol

MgI2: percent composition by element

• Iodine (I) = 253.80894 : 278.11394 * 100 = 91.261 %
• Magnesium (Mg) = 24.305 : 278.11394 * 100 = 8.739 %

Molar mass calculator