Molar mass of hydroiodic acid (HI)

The molar mass of hydroiodic acid (HI) is 127.908 g/mol.

hydrogen iodide

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Hydrogen × 1 1.008 = 1.008
Iodine × 1 126.9 = 126.9
Total127.908 g/mol

Percent composition by element

  • Hydrogen 0.79%
  • Iodine 99.21%

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H2O NaCl CO2 C6H12O6 H2SO4 Ca(OH)2 CuSO4·5H2O C8H10N4O2

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Related compounds

NaOH Sodium hydroxide NH3 Ammonia H2O Water H2SO4 Sulfuric acid HCl Hydrochloric acid H2 Hydrogen gas

FAQ

What is the molar mass of HI?

The molar mass of hydroiodic acid (HI) is 127.908 g/mol.

How do you calculate the molar mass of HI?

Multiply the atomic mass of each element by the number of its atoms in HI, then add the results: 1 × 1.008 (H) + 1 × 126.9 (I) = 127.908 g/mol.

What percentage of HI is Iodine?

Iodine makes up 99.21% of the mass of hydroiodic acid (HI).