Molar and molecular weight of C2H2

• Relative molecular weight of C2H2: 26.03728
• Molar mass of C2H2: 26.03728 g/mol (0.02604 kg/mol)

Calculation of the relative molecular and molar mass of C2H2

• Mr[C2H2] = Ar[C] * 2 + Ar[H] * 2 = 12.0107 * 2 + 1.00794 * 2 = 26.03728
• Molar mass (kg/mol) = Mr[C2H2] : 1000 = 26.03728 : 1000 = 0.02604 kg/mol

C2H2: percent composition by element

• Carbon (C) = 24.0214 : 26.03728 * 100 = 92.258 %
• Hydrogen (H) = 2.01588 : 26.03728 * 100 = 7.742 %

Molar mass calculator