Molar and molecular weight of H3AsO4

• Relative molecular weight of H3AsO4: 141.94302
• Molar mass of H3AsO4: 141.94302 g/mol (0.14194 kg/mol)

Calculation of the relative molecular and molar mass of H3AsO4

• Mr[H3AsO4] = Ar[H] * 3 + Ar[As] + Ar[O] * 4 = 1.00794 * 3 + 74.9216 + 15.9994 * 4 = 141.94302
• Molar mass (kg/mol) = Mr[H3AsO4] : 1000 = 141.94302 : 1000 = 0.14194 kg/mol

H3AsO4: percent composition by element

• Hydrogen (H) = 3.02382 : 141.94302 * 100 = 2.13 %
• Arsenic (As) = 74.9216 : 141.94302 * 100 = 52.783 %
• Oxygen (O) = 63.9976 : 141.94302 * 100 = 45.087 %

Molar mass calculator