In two molecules of 2K2CO3, there are a total of 6 oxygen atoms because each molecule of potassium carbonate contains 3 oxygen atoms.
To determine how many oxygen atoms are in two molecules of 2K2CO3, we first need to understand the molecular formula of potassium carbonate (K2CO3). The formula indicates that each molecule contains one carbon atom (C), three oxygen atoms (O), and two pairs of potassium atoms (2K). Therefore, one molecule of K2CO3 contains three oxygen atoms.
Since we are looking for the number of oxygen atoms in two molecules, we simply need to multiply the number of oxygen atoms in one molecule by two. This calculation gives us: 3 oxygen atoms/molecule × 2 molecules = 6 oxygen atoms. Hence, there are a total of 6 oxygen atoms in two molecules of 2K2CO3.