Calculate the% content of elements in the following substance KMnO4.
| December 21, 2020 | education
Let’s calculate the molar mass of potassium permanganate KMnO4:
M (KMnO4) = 39 + 55 + 16 * 4 = 158 g / mol
Let’s find the mass fraction of potassium in the substance:
w (K) = 39/158 * 100 = 24.7%
Let’s find the mass fraction of manganese in the substance:
w (Mn) = 55/158 * 100 = 34.8%
Let’s find the mass fraction of oxygen in the substance:
w (O) = 16 * 4/158 * 100 = 40.5%
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