---
title: "A student analyzes a pure sample of calcium carbonate, \\(\\text{CaCO}_3\\), used to neutralize acidic agricultural soil. What is the percent by mass of oxygen in pure \\(\\text{CaCO}_3\\)? (The molar mass of \\(\\text{CaCO}_3\\) is \\(100.1 \\text{ g/mol}\\).)"
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url: "https://nerd-notes.com/ubq/120006/"
date_modified: "2026-08-21T08:31:49+00:00"
---

# A student analyzes a pure sample of calcium carbonate, \(\text{CaCO}_3\), used to neutralize acidic agricultural soil. What is the percent by mass of oxygen in pure \(\text{CaCO}_3\)? (The molar mass of \(\text{CaCO}_3\) is \(100.1 \text{ g/mol}\).)

A student analyzes a pure sample of calcium carbonate, \(\text{CaCO}_3\), used to neutralize acidic agricultural soil. What is the percent by mass of oxygen in pure \(\text{CaCO}_3\)? (The molar mass of \(\text{CaCO}_3\) is \(100.1 \text{ g/mol}\).)

- **A.** \(16.0\%\)
- **B.** \(48.0\%\)
- **C.** \(52.0\%\)
- **D.** \(60.0\%\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120006/*