## Chemistry: The Central Science (13th Edition)

1. Find the molar mass of Vanillin $C_{8}H_{8}O_{3}$: C: 12 x 8 = 96 H: 1 x 8 = 8 O: 16 x 3 = 48 96 + 8 + 48 = 152g/mol 2. Divide the mass of Carbon by the total mass of the molecule, and multiply the result by 100%: $\frac{96}{152}$ x 100% $\approx$ 63.16%