# Calculate the oxide formula knowing that the mass fraction of the element Sn in it is 88.1%.

August 28, 2021 | education

| Oxide is a compound with oxygen, that is, the formula of our oxide will look like SnOx. Tin forms two oxides SnO and SnO2. Now let’s find x.

The mass fraction of an element is found by the formula: w = (A * n) / M, where A is the relative atomic mass of the element, n is the index (how many elements are in the compound), M is the relative molecular weight of the compound, and A and M are determined by the periodic table … Let us express and find M: M = (A * n) / w = (118.7 * 1) / 0.881 = 134.7. With such a molecular weight – tin (IV) oxide SnO2.

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