Molar and molecular weight of Li2SeO3

• Relative molecular weight of Li2SeO3: 140.8402
• Molar mass of Li2SeO3: 140.8402 g/mol (0.14084 kg/mol)

Calculation of the relative molecular and molar mass of Li2SeO3

• Mr[Li2SeO3] = Ar[Li] * 2 + Ar[Se] + Ar[O] * 3 = 6.941 * 2 + 78.96 + 15.9994 * 3 = 140.8402
• Molar mass (kg/mol) = Mr[Li2SeO3] : 1000 = 140.8402 : 1000 = 0.14084 kg/mol

Li2SeO3: percent composition by element

• Lithium (Li) = 13.882 : 140.8402 * 100 = 9.857 %
• Selenium (Se) = 78.96 : 140.8402 * 100 = 56.064 %
• Oxygen (O) = 47.9982 : 140.8402 * 100 = 34.08 %

Molar mass calculator