Chapter 4, Problem 38PS

### 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

# To find the formula of a compound composed of iron and carbon monoxide, Fex(CO)yx, the compound is burned in pure oxygen to give Fe2O3 and CO2. if you burn 1.959 g of Fex(CO)y and obtain 0.799 g of Fe2O3 and 2.200 g of CO2, what is the empirical formula of Fex(CO)y?

Interpretation Introduction

Interpretation:

The empirical formula of Fex(CO)y should be determined.

Concept introduction:

• Empirical formula of a compound represents the smallest whole number relative ratio of elements in that compound.
• Amount of substance (in mole) can be calculated by using the following equation,

Numberofmole=GivenmassofthesubstanceMolarmass

• 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

When 1.959g of given sample is burned in oxygen, 0.799â€‰g of Fe2O3 and 2.200â€‰gâ€‰ofâ€‰â€‰CO2 will obtain.

The reaction can be represented as

â€‚Â Fex(CO)yâ€‰â†’Fe2O3+CO2

From the given masses the amount of Fe2O3Â andâ€‹â€‹â€‰â€‰CO2â€‰ can be calculated.

Thus, amount of Fe2O3Â andâ€‹â€‹â€‰â€‰CO2â€‰ isolated from the combustion of given compound are,

â€‚Â 0.799gâ€‰Fe2O3Ã—â€‰1â€‰molâ€‰Fe2O3159.69â€‰gâ€‰Fe2O3â€‰=â€‰0.0050â€‰molâ€‰Fe2O32.200gâ€‰CO2â€‰Ã—â€‰1â€‰molâ€‰CO244.010â€‰gâ€‰CO2â€‰=â€‰0.0499â€‰molâ€‰CO2

For every mole of Fe2O3 isolated, 2â€‰â€‰molâ€‰ofâ€‰Fe must have been present in the given compound.

So,

â€‚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

#### True or false? Action potentials vary in their size

Biology: The Unity and Diversity of Life (MindTap Course List)