What is the formula of chlorophyll?
Hi Manjari! The molecular formula of chlorophyll a is C55H72MgN4O5; the molecular formula of chlorophyll b is C55H70MgN4O6. The difference between the two chlorophylls is that a methyl side-chain in chlorophyll a is replaced by a formyl group in chlorophyll b. Chlorophyll a is found with chlorophyll c in many types of marine algae. Red algae contain principally chlorophyll a and also chlorophyll d.