Molar and molecular weight of H2Cr2O7

• Relative molecular weight of H2Cr2O7: 218.00388
• Molar mass of H2Cr2O7: 218.00388 g/mol (0.218 kg/mol)

Calculation of the relative molecular and molar mass of H2Cr2O7

• Mr[H2Cr2O7] = Ar[H] * 2 + Ar[Cr] * 2 + Ar[O] * 7 = 1.00794 * 2 + 51.9961 * 2 + 15.9994 * 7 = 218.00388
• Molar mass (kg/mol) = Mr[H2Cr2O7] : 1000 = 218.00388 : 1000 = 0.218 kg/mol

H2Cr2O7: percent composition by element

• Hydrogen (H) = 2.01588 : 218.00388 * 100 = 0.925 %
• Chromium (Cr) = 103.9922 : 218.00388 * 100 = 47.702 %
• Oxygen (O) = 111.9958 : 218.00388 * 100 = 51.373 %

Molar mass calculator