Molar and molecular weight of H2Se

• Relative molecular weight of H2Se: 80.97588
• Molar mass of H2Se: 80.97588 g/mol (0.08098 kg/mol)

Calculation of the relative molecular and molar mass of H2Se

• Mr[H2Se] = Ar[H] * 2 + Ar[Se] = 1.00794 * 2 + 78.96 = 80.97588
• Molar mass (kg/mol) = Mr[H2Se] : 1000 = 80.97588 : 1000 = 0.08098 kg/mol

H2Se: percent composition by element

• Hydrogen (H) = 2.01588 : 80.97588 * 100 = 2.489 %
• Selenium (Se) = 78.96 : 80.97588 * 100 = 97.511 %

Molar mass calculator