Molar and molecular weight of HNO3

• Molecular formula: HNO3 or HONO2
• Relative molecular weight of HNO3: 63.01284
• Molar mass of HNO3: 63.01284 g/mol (0.06301 kg/mol)

Calculation of the relative molecular and molar mass of HNO3

• Mr[HNO3] = Ar[H] + Ar[N] + Ar[O] * 3 = 1.00794 + 14.0067 + 15.9994 * 3 = 63.01284
• Molar mass (kg/mol) = Mr[HNO3] : 1000 = 63.01284 : 1000 = 0.06301 kg/mol

HNO3: percent composition by element

• Hydrogen (H) = 1.00794 : 63.01284 * 100 = 1.6 %
• Nitrogen (N) = 14.0067 : 63.01284 * 100 = 22.228 %
• Oxygen (O) = 47.9982 : 63.01284 * 100 = 76.172 %

Molar mass calculator