To determine the number of oxygen atoms in one formula unit of potassium carbonate ([tex]\(K_2CO_3\)[/tex]), let's break down the chemical formula [tex]\(K_2CO_3\)[/tex].
1. The formula [tex]\(K_2CO_3\)[/tex] represents potassium carbonate.
2. In this formula:
- [tex]\(K_2\)[/tex] signifies there are 2 potassium (K) atoms.
- [tex]\(C\)[/tex] signifies there is 1 carbon (C) atom.
- [tex]\(O_3\)[/tex] signifies there are 3 oxygen (O) atoms.
Therefore, one formula unit of potassium carbonate ([tex]\(K_2CO_3\)[/tex]) contains 3 oxygen atoms.
The correct answer is:
D. 3 atoms
