Here's how to determine the number of atoms in the chemical formula NaC₂H₃O₂ (sodium acetate):

* Break down the formula:

* Na: 1 sodium atom

* C₂: 2 carbon atoms

* H₃: 3 hydrogen atoms

* O₂: 2 oxygen atoms

* Total atoms: 1 + 2 + 3 + 2 = 8 atoms

Therefore, there are 8 atoms in one molecule of NaC₂H₃O₂.