Molar and molecular weight of MgH2

• Molecular formula: MgH2 or H2Mg
• Relative molecular weight of MgH2: 26.32088
• Molar mass of MgH2: 26.32088 g/mol (0.02632 kg/mol)

Calculation of the relative molecular and molar mass of MgH2

• Mr[MgH2] = Ar[H] * 2 + Ar[Mg] = 1.00794 * 2 + 24.305 = 26.32088
• Molar mass (kg/mol) = Mr[MgH2] : 1000 = 26.32088 : 1000 = 0.02632 kg/mol

MgH2: percent composition by element

• Hydrogen (H) = 2.01588 : 26.32088 * 100 = 7.659 %
• Magnesium (Mg) = 24.305 : 26.32088 * 100 = 92.341 %

Molar mass calculator