The statement that the vitamin niacin (C6H5N02) is an organic molecule is true. Here's why:
1. Niacin is a vitamin that belongs to the B vitamin group, specifically known as vitamin B3.
2. The molecular formula of niacin, C6H5N02, contains carbon (C), hydrogen (H), nitrogen (N), and oxygen (O) atoms, which are all elements commonly found in organic compounds.
3. Organic molecules are compounds that contain carbon-hydrogen (C-H) bonds. Since niacin contains carbon atoms bonded to hydrogen atoms, it is classified as an organic molecule.
4. Niacin is naturally found in foods like meat, fish, nuts, and grains, which further supports its classification as an organic compound.
In conclusion, niacin is indeed an organic molecule due to its chemical composition containing carbon and hydrogen atoms, typical of organic compounds.