**Chapter 4: Stoichiometry: Quantitative Information About Chemical Reactions**---**Sample Problem:**A sample of limestone and other soil materials was heated, and the limestone decomposed to give calcium oxide and carbon dioxide.The chemical equation for the reaction is:\[\text{CaCO}_3(s) \rightarrow \text{CaO}(s) + \text{CO}_2(g)\]A 2.067 g sample of limestone-containing material gave 0.759 g of CO₂ after being heated at a high temperature. What was the mass percent of CaCO₃ in the original sample?\[\text{Mass Percent:} \, \boxed{\phantom{space}} \%\]**Instructions:**- Calculate the mass of CaCO₃ present by using stoichiometry.- Determine the mass percent of CaCO₃ in the sample. ## Chapter 4: Stoichiometry - Quantitative Information About Chemical Reactions### Problem*Styrene, the building block of polystyrene, consists of only C (carbon) and H (hydrogen). If 10.030 g of styrene is burned in oxygen and produces 33.943 g of CO₂ (carbon dioxide) and 6.924 g of H₂O (water), what is the empirical formula of styrene?***Empirical formula:** [____]

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CHAPTER 4 - STOICHIOMET O Previous Page 3 of 5 Nex A sample of limestone and other soil materials CACO3 (s) CaO(s) + CO2(g) - A 2.074 g sample of limestone-containing mateE sample?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Question

**Chapter 4: Stoichiometry: Quantitative Information About Chemical Reactions**

---

**Sample Problem:**

A sample of limestone and other soil materials was heated, and the limestone decomposed to give calcium oxide and carbon dioxide.

The chemical equation for the reaction is:

\[
\text{CaCO}_3(s) \rightarrow \text{CaO}(s) + \text{CO}_2(g)
\]

A 2.067 g sample of limestone-containing material gave 0.759 g of CO₂ after being heated at a high temperature. What was the mass percent of CaCO₃ in the original sample?

\[
\text{Mass Percent:} \, \boxed{\phantom{space}} \%
\]

**Instructions:**

- Calculate the mass of CaCO₃ present by using stoichiometry.
- Determine the mass percent of CaCO₃ in the sample.

## Chapter 4: Stoichiometry - Quantitative Information About Chemical Reactions

### Problem

*Styrene, the building block of polystyrene, consists of only C (carbon) and H (hydrogen). If 10.030 g of styrene is burned in oxygen and produces 33.943 g of CO₂ (carbon dioxide) and 6.924 g of H₂O (water), what is the empirical formula of styrene?*

**Empirical formula:** [____]

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