---
title: "A student analyzes two pure solid fertilizer samples:  | 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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url: "https://nerd-notes.com/ubq/120163/"
date_modified: "2026-08-21T16:02:41+00:00"
---

# A student analyzes two pure solid fertilizer samples:

| 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?

A student analyzes two pure solid fertilizer samples:

| 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?

- **A.** \(\dfrac{8}{7}\)
- **B.** \(\dfrac{7}{6}\)
- **C.** \(\dfrac{5}{4}\)
- **D.** \(\dfrac{4}{3}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120163/*