What Is The Molar Mass Of Aspirin C9H804?

The molar mass is the sum of all the atoms present in one mole of a compound. Since the molecular formula of aspirin is C₉H₈O₄, we need to add up the atomic weights of all the elements present in it:
Carbon (9 atoms) = 12x9 = 108
Hydrogen (8 atoms) = 1x8 = 8
Oxygen (4 atoms) = 16x4 = 64

To obtain the molar mass of aspirin, simply add up all the values given above;

Molar mass of aspirin = C+H+O
  = 108+8+64
  = 180

Thus, the molar mass of aspirin is 180 g/mol.
 

9*12+8*1+4*16=180