Molar and molecular weight of Fe2S3

• Relative molecular weight of Fe2S3: 207.885
• Molar mass of Fe2S3: 207.885 g/mol (0.20789 kg/mol)

Calculation of the relative molecular and molar mass of Fe2S3

• Mr[Fe2S3] = Ar[Fe] * 2 + Ar[S] * 3 = 55.845 * 2 + 32.065 * 3 = 207.885
• Molar mass (kg/mol) = Mr[Fe2S3] : 1000 = 207.885 : 1000 = 0.20789 kg/mol

Fe2S3: percent composition by element

• Iron (Fe) = 111.69 : 207.885 * 100 = 53.727 %
• Sulfur (S) = 96.195 : 207.885 * 100 = 46.273 %

Molar mass calculator