Molar and molecular weight of As2S5

• Relative molecular weight of As2S5: 310.1682
• Molar mass of As2S5: 310.1682 g/mol (0.31017 kg/mol)

Calculation of the relative molecular and molar mass of As2S5

• Mr[As2S5] = Ar[As] * 2 + Ar[S] * 5 = 74.9216 * 2 + 32.065 * 5 = 310.1682
• Molar mass (kg/mol) = Mr[As2S5] : 1000 = 310.1682 : 1000 = 0.31017 kg/mol

As2S5: percent composition by element

• Arsenic (As) = 149.8432 : 310.1682 * 100 = 48.31 %
• Sulfur (S) = 160.325 : 310.1682 * 100 = 51.69 %

Molar mass calculator