Molar and molecular weight of C9H20

• Molecular formula: C9H20 or CH3(CH2)7CH3
• Relative molecular weight of C9H20: 128.2551
• Molar mass of C9H20: 128.2551 g/mol (0.12826 kg/mol)

Calculation of the relative molecular and molar mass of C9H20

• Mr[C9H20] = Ar[C] * 9 + Ar[H] * 20 = 12.0107 * 9 + 1.00794 * 20 = 128.2551
• Molar mass (kg/mol) = Mr[C9H20] : 1000 = 128.2551 : 1000 = 0.12826 kg/mol

C9H20: percent composition by element

• Carbon (C) = 108.0963 : 128.2551 * 100 = 84.282 %
• Hydrogen (H) = 20.1588 : 128.2551 * 100 = 15.718 %

Molar mass calculator