AP Chemistry
1.3 Elemental Composition of Pure Substances
An agricultural chemist analyzes three nitrogen-based fertilizer compounds to compare their nitrogen content. The chemical formula and approximate molar mass of each pure salt are given in the table below.
Based on the data in the table, which of the following correctly ranks the fertilizers in order of greatest to least percent nitrogen by mass?
| Fertilizer | Formula | Molar mass (\(\text{g/mol}\)) |
|---|---|---|
| Ammonium nitrate | \(\text{NH}_4\text{NO}_3\) | \(80.0\) |
| Potassium nitrate | \(\text{KNO}_3\) | \(101.1\) |
| Ammonium sulfate | \((\text{NH}_4)_2\text{SO}_4\) | \(132.1\) |
Based on the data in the table, which of the following correctly ranks the fertilizers in order of greatest to least percent nitrogen by mass?
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