Molar and molecular weight of C20H40O2

• Molecular formula: C20H40O2 or CH3(CH2)18COOH
• Relative molecular weight of C20H40O2: 312.5304
• Molar mass of C20H40O2: 312.5304 g/mol (0.31253 kg/mol)

Calculation of the relative molecular and molar mass of C20H40O2

• Mr[C20H40O2] = Ar[C] * 20 + Ar[H] * 40 + Ar[O] * 2 = 12.0107 * 20 + 1.00794 * 40 + 15.9994 * 2 = 312.5304
• Molar mass (kg/mol) = Mr[C20H40O2] : 1000 = 312.5304 : 1000 = 0.31253 kg/mol

C20H40O2: percent composition by element

• Carbon (C) = 240.214 : 312.5304 * 100 = 76.861 %
• Hydrogen (H) = 40.3176 : 312.5304 * 100 = 12.9 %
• Oxygen (O) = 31.9988 : 312.5304 * 100 = 10.239 %

Molar mass calculator