Here's how to determine the number of atoms in NaHSO₄ (sodium bisulfate):

* Count the elements: There are 5 atoms in the formula:

* 1 sodium atom (Na)

* 1 hydrogen atom (H)

* 1 sulfur atom (S)

* 4 oxygen atoms (O)

Therefore, there are a total of 5 atoms in one molecule of NaHSO₄.