Molar and molecular weight of H2SiO3

• Molecular formula: H2SiO3 or H2O3Si
• Relative molecular weight of H2SiO3: 78.09958
• Molar mass of H2SiO3: 78.09958 g/mol (0.0781 kg/mol)

Calculation of the relative molecular and molar mass of H2SiO3

• Mr[H2SiO3] = Ar[H] * 2 + Ar[O] * 3 + Ar[Si] = 1.00794 * 2 + 15.9994 * 3 + 28.0855 = 78.09958
• Molar mass (kg/mol) = Mr[H2SiO3] : 1000 = 78.09958 : 1000 = 0.0781 kg/mol

H2SiO3: percent composition by element

• Hydrogen (H) = 2.01588 : 78.09958 * 100 = 2.581 %
• Oxygen (O) = 47.9982 : 78.09958 * 100 = 61.458 %
• Silicon (Si) = 28.0855 : 78.09958 * 100 = 35.961 %

Molar mass calculator