Molar and molecular weight of HI

• Relative molecular weight of HI: 127.91241
• Molar mass of HI: 127.91241 g/mol (0.12791 kg/mol)

Calculation of the relative molecular and molar mass of HI

• Mr[HI] = Ar[H] + Ar[I] = 1.00794 + 126.90447 = 127.91241
• Molar mass (kg/mol) = Mr[HI] : 1000 = 127.91241 : 1000 = 0.12791 kg/mol

HI: percent composition by element

• Hydrogen (H) = 1.00794 : 127.91241 * 100 = 0.788 %
• Iodine (I) = 126.90447 : 127.91241 * 100 = 99.212 %

Molar mass calculator