AP Chemistry
1.8 Valence Electrons and Ionic Compounds
1.5 Atomic Structure and Electron Configuration
1.1 Moles and Molar Mass
A student analyzes two pure solid fertilizer samples:
What is the ratio of the total number of valence electrons present in Sample X to the total number of valence electrons present in Sample Y?
| Sample | Compound | Mass of sample (g) | Molar mass (g/mol) |
|---|---|---|---|
| X | \((\text{NH}_4)_3\text{PO}_4\) | \(14.9\) | \(149\) |
| Y | \((\text{NH}_4)_2\text{HPO}_4\) | \(13.2\) | \(132\) |
What is the ratio of the total number of valence electrons present in Sample X to the total number of valence electrons present in Sample Y?
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