Molar and molecular weight of C19H40

• Molecular formula: C19H40 or CH3(CH2)17CH3
• Relative molecular weight of C19H40: 268.5209
• Molar mass of C19H40: 268.5209 g/mol (0.26852 kg/mol)

Calculation of the relative molecular and molar mass of C19H40

• Mr[C19H40] = Ar[C] * 19 + Ar[H] * 40 = 12.0107 * 19 + 1.00794 * 40 = 268.5209
• Molar mass (kg/mol) = Mr[C19H40] : 1000 = 268.5209 : 1000 = 0.26852 kg/mol

C19H40: percent composition by element

• Carbon (C) = 228.2033 : 268.5209 * 100 = 84.985 %
• Hydrogen (H) = 40.3176 : 268.5209 * 100 = 15.015 %

Molar mass calculator