To determine the number of moles of KMnO4 that contain 1 mole of an oxygen atom, we need to consider the molar ratio between KMnO4 and oxygen atoms.
The formula for potassium permanganate (KMnO4) is KMnO4, which indicates that it contains one atom of potassium (K), one atom of manganese (Mn), and four atoms of oxygen (O).
From the formula, we can see that one mole of KMnO4 contains four moles of oxygen atoms (O). Therefore, if we have 1 mole of an oxygen atom, we would need 1/4 mole of KMnO4.
So, the number of moles of KMnO4 that contain 1 mole of an oxygen atom is 1/4 mole.