Molar and molecular weight of (NH4)2Cr2O7

• Molecular formula: (NH4)2Cr2O7 or H8Cr2N2O7
• Relative molecular weight of (NH4)2Cr2O7: 252.06492
• Molar mass of (NH4)2Cr2O7: 252.06492 g/mol (0.25206 kg/mol)

Calculation of the relative molecular and molar mass of (NH4)2Cr2O7

• Mr[(NH4)2Cr2O7] = Ar[H] * 8 + Ar[Cr] * 2 + Ar[N] * 2 + Ar[O] * 7 = 1.00794 * 8 + 51.9961 * 2 + 14.0067 * 2 + 15.9994 * 7 = 252.06492
• Molar mass (kg/mol) = Mr[(NH4)2Cr2O7] : 1000 = 252.06492 : 1000 = 0.25206 kg/mol

(NH4)2Cr2O7: percent composition by element

• Hydrogen (H) = 8.06352 : 252.06492 * 100 = 3.199 %
• Chromium (Cr) = 103.9922 : 252.06492 * 100 = 41.256 %
• Nitrogen (N) = 28.0134 : 252.06492 * 100 = 11.114 %
• Oxygen (O) = 111.9958 : 252.06492 * 100 = 44.431 %

Molar mass calculator