* Count the subscripts: The subscripts in a chemical formula tell you how many of each type of atom are present.
* Carbon (C): 4 atoms
* Hydrogen (H): 10 atoms
* Nitrogen (N): 3 atoms
* Oxygen (O): 5 atoms
* Phosphorus (P): 1 atom
* Add them up: 4 + 10 + 3 + 5 + 1 = 23 atoms
Therefore, there are 23 atoms in the molecule C4H10N3O5P.
