Final answer:
One molecule of vitamin B12, or cyanocobalamin, contains a total of 181 atoms.
Step-by-step explanation:
The number of atoms in one molecule of vitamin B12, or cyanocobalamin (C₆₃H₈₈CoN₁₄O₁₄P), can be calculated by adding the total counts of each type of atom. The molecular formula indicates that there are 63 carbon (C) atoms, 88 hydrogen (H) atoms, 1 cobalt (Co) atom, 14 nitrogen (N) atoms, 14 oxygen (O) atoms, and 1 phosphorus (P) atom. Adding these counts together gives us a total of:
63 (C) + 88 (H) + 1 (Co) + 14 (N) + 14 (O) + 1 (P) = 181 atoms in one molecule of vitamin B12.