Molar and molecular weight of HCN

• Molecular formula: HCN or CHN
• Relative molecular weight of HCN: 27.02534
• Molar mass of HCN: 27.02534 g/mol (0.02703 kg/mol)

Calculation of the relative molecular and molar mass of HCN

• Mr[HCN] = Ar[C] + Ar[H] + Ar[N] = 12.0107 + 1.00794 + 14.0067 = 27.02534
• Molar mass (kg/mol) = Mr[HCN] : 1000 = 27.02534 : 1000 = 0.02703 kg/mol

HCN: percent composition by element

• Carbon (C) = 12.0107 : 27.02534 * 100 = 44.442 %
• Hydrogen (H) = 1.00794 : 27.02534 * 100 = 3.73 %
• Nitrogen (N) = 14.0067 : 27.02534 * 100 = 51.828 %

Molar mass calculator