Molar and molecular weight of Na2Cr2O7

• Molecular formula: Na2Cr2O7 or Cr2Na2O7
• Relative molecular weight of Na2Cr2O7: 261.96753856
• Molar mass of Na2Cr2O7: 261.96753856 g/mol (0.26197 kg/mol)

Calculation of the relative molecular and molar mass of Na2Cr2O7

• Mr[Na2Cr2O7] = Ar[Cr] * 2 + Ar[Na] * 2 + Ar[O] * 7 = 51.9961 * 2 + 22.98976928 * 2 + 15.9994 * 7 = 261.96753856
• Molar mass (kg/mol) = Mr[Na2Cr2O7] : 1000 = 261.96753856 : 1000 = 0.26197 kg/mol

Na2Cr2O7: percent composition by element

• Chromium (Cr) = 103.9922 : 261.96753856 * 100 = 39.697 %
• Sodium (Na) = 45.97953856 : 261.96753856 * 100 = 17.552 %
• Oxygen (O) = 111.9958 : 261.96753856 * 100 = 42.752 %

Molar mass calculator