Molar and molecular weight of C8H18

• Relative molecular weight of C8H18: 114.22852
• Molar mass of C8H18: 114.22852 g/mol (0.11423 kg/mol)

Calculation of the relative molecular and molar mass of C8H18

• Mr[C8H18] = Ar[C] * 8 + Ar[H] * 18 = 12.0107 * 8 + 1.00794 * 18 = 114.22852
• Molar mass (kg/mol) = Mr[C8H18] : 1000 = 114.22852 : 1000 = 0.11423 kg/mol

C8H18: percent composition by element

• Carbon (C) = 96.0856 : 114.22852 * 100 = 84.117 %
• Hydrogen (H) = 18.14292 : 114.22852 * 100 = 15.883 %

Molar mass calculator