The formula mass of oxalic acid H2C2O4 is =90.036
Explanation
- The formula mass is sum of atomic weights of atoms in a molecule.
- for oxalic acid is the sum of atomic weight of Hydrogen(H) + carbon(C) +oxygen (O).
= (2 x 1.008) + (12.01 x2) + (16 x4)=90.036
