Molar and molecular weight of H2SeO4

• Molecular formula: H2SeO4 or H2O4Se
• Relative molecular weight of H2SeO4: 144.97348
• Molar mass of H2SeO4: 144.97348 g/mol (0.14497 kg/mol)

Calculation of the relative molecular and molar mass of H2SeO4

• Mr[H2SeO4] = Ar[H] * 2 + Ar[O] * 4 + Ar[Se] = 1.00794 * 2 + 15.9994 * 4 + 78.96 = 144.97348
• Molar mass (kg/mol) = Mr[H2SeO4] : 1000 = 144.97348 : 1000 = 0.14497 kg/mol

H2SeO4: percent composition by element

• Hydrogen (H) = 2.01588 : 144.97348 * 100 = 1.391 %
• Oxygen (O) = 63.9976 : 144.97348 * 100 = 44.144 %
• Selenium (Se) = 78.96 : 144.97348 * 100 = 54.465 %

Molar mass calculator