Skip to main content
Ch.3 - Chemical Reactions and Reaction Stoichiometry
Chapter 3, Problem 3b

The following diagram represents the collection of elements formed by a decomposition reaction. (b) Could you draw a diagram representing the molecules of the compound that had been decomposed? Why or why not?
Diagram showing green and yellow spheres representing elements from a decomposition reaction.

Verified step by step guidance
1
Identify the elements present in the diagram. The green spheres represent one element, and the yellow spheres represent another element.
Observe the arrangement of the spheres. The green spheres are paired together, indicating they form diatomic molecules. The yellow spheres are single, indicating they are individual atoms.
Consider the decomposition reaction. A compound decomposes into its constituent elements. In this case, the compound must have contained both green and yellow spheres.
To draw the original compound, combine the green and yellow spheres in a way that represents a single molecule. Since the green spheres are diatomic, the original compound likely had a formula where one green diatomic molecule is bonded to one or more yellow atoms.
Draw a diagram with the green diatomic molecule (two green spheres) bonded to the yellow atoms. This represents the compound before decomposition.

Verified Solution

Video duration:
1m
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Decomposition Reaction

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. This process often requires energy input, such as heat, light, or electricity. Understanding this concept is crucial for analyzing the diagram, as it illustrates the elements resulting from the breakdown of a compound.
Recommended video:
Guided course
01:30
Alcohol Reactions: Dehydration Reactions

Molecular Representation

Molecular representation involves depicting the arrangement and types of atoms in a molecule. In the context of the question, drawing the original compound before decomposition requires knowledge of how atoms bond to form molecules, which is essential for visualizing the transformation that occurs during a decomposition reaction.
Recommended video:
Guided course
02:38
Molecular Polarity

Elemental Composition

Elemental composition refers to the types and quantities of elements that make up a compound. In the provided diagram, the green and yellow spheres represent different elements. Recognizing the elemental composition is vital for understanding what the original compound was and how its decomposition leads to the formation of individual elements.
Recommended video:
Guided course
04:19
Matter Composition
Related Practice
Textbook Question

The following diagram shows the combination reaction between hydrogen, H2, and carbon monoxide, CO, to produce methanol, CH3OH (white spheres are H, black spheres are C, red spheres are O). The correct number of CO molecules involved in this reaction is not shown. (a) Determine the number of CO molecules that should be shown in the left (reactants) box.

608
views
Textbook Question

The following diagram shows the combination reaction between hydrogen, H2, and carbon monoxide, CO, to produce methanol, CH3OH (white spheres are H, black spheres are C, red spheres are O). The correct number of CO molecules involved in this reaction is not shown. (b) Write a balanced chemical equation for the reaction.

457
views
Textbook Question

The following diagram represents the collection of elements formed by a decomposition reaction. (a) If the blue spheres represent N atoms and the red ones represent O atoms, what was the empirical formula of the original compound?

741
views
1
rank
Textbook Question

The following diagram represents the collection of CO2 and H2O molecules formed by complete combustion of a hydrocarbon. What is the empirical formula of the hydrocarbon?

818
views
1
rank
Textbook Question

Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model. (a) Write its molecular formula.

621
views
Textbook Question

Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model. (c) Calculate how many moles of glycine are in a 100.0-g sample of glycine.

578
views