The simplest formula for vitamin C is C3H4O3. Experimental data indicates that the molecular mass of vitamin C is about 180. What is the molecular formula of vitamin C?
Start by working out the masses of the atoms in the simplest (empirical) formula: (3 x 12) + (4 x 1) + (3 x 16) = 88
So the relative formula mass is a multiple of 88. To see which multiple, we divide the experimental
So the molecular formula is 2x the simplest formula: