Chapter 4, Problem 31PS

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# Styrene, the building block of polystyrene, consists of only C and H. If 0.438 g of styrene is burned in oxygen and produces 1.481 g of CO2 and 0.303 g of H2O, what. is the empirical formula of styrene?

Interpretation Introduction

Interpretation:

The empirical formula of styrene should be determined.

Concept introduction:

• Empirical formula of a compound represents the smallest whole number relative ratio of elements in that compound.
• Equation for finding Molecular formula from the empirical formula,

MolarmassEmpiricalformula mass × Empirical formula

• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
Explanation

From the given masses the amount of CO2â€‰andâ€‰H2O can be calculated.

Thus, amount of CO2â€‰andâ€‰H2O isolated from the combustion are,

â€‚Â 1.481â€‰gâ€‰CO2â€‰Ã—â€‰1â€‰molâ€‰CO244.010â€‰gâ€‰CO2â€‰=â€‰0.03365â€‰â€‰molâ€‰CO20.303â€‰gâ€‰H2Oâ€‰Ã—1â€‰molâ€‰H2O18.015â€‰gâ€‰H2Oâ€‰=â€‰0.01681â€‰molâ€‰H2O

For every mole of CO2 isolated, 1 mol of C must have been present in the styrene compound.

So,

â€‚Â 0.03365â€‰molâ€‰CO2â€‰Ã—1â€‰molâ€‰Câ€‰inâ€‰unknown1â€‰molâ€‰CO2â€‰=â€‰0

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started