The oxide of the element has the composition EO3, The mass fraction of oxygen in this oxide is 60%.
| February 9, 2021 | education
The oxide of the element has the composition EO3, The mass fraction of oxygen in this oxide is 60%. What element forms the oxide?
1. Three oxygen atoms have a molecular weight:
16 * 3 = 48;
2. Oxygen is only 60% in oxide. All oxide has a molecular weight:
48 / 0.6 = 80;
3. Let’s find the molecular weight of the unknown element:
80 – 48 = 32;
The unknown element is sulfur, the oxide of which has the formula SO3.
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