Molar and molecular weight of Li2S

• Relative molecular weight of Li2S: 45.947
• Molar mass of Li2S: 45.947 g/mol (0.04595 kg/mol)

Calculation of the relative molecular and molar mass of Li2S

• Mr[Li2S] = Ar[Li] * 2 + Ar[S] = 6.941 * 2 + 32.065 = 45.947
• Molar mass (kg/mol) = Mr[Li2S] : 1000 = 45.947 : 1000 = 0.04595 kg/mol

Li2S: percent composition by element

• Lithium (Li) = 13.882 : 45.947 * 100 = 30.213 %
• Sulfur (S) = 32.065 : 45.947 * 100 = 69.787 %

Molar mass calculator