Skip to main content
Ch.3 - Molecules and Compounds
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Not the one you use?Change textbook
All textbooksTro 6th EditionCh.3 - Molecules and CompoundsProblem 90
Chapter 3, Problem 90

Determine the number of moles of oxygen atoms in each sample. a. 4.88 mol H2O2 b. 2.15 mol N2O c. 0.0237 mol H2CO3 d. 24.1 mol CO2

Verified step by step guidance
1
Identify the chemical formula of each compound to determine the number of oxygen atoms per molecule. For H2O2, there are 2 oxygen atoms; for N2O, there is 1 oxygen atom; for H2CO3, there are 3 oxygen atoms; and for CO2, there are 2 oxygen atoms.
Use the mole concept, which states that 1 mole of a substance contains Avogadro's number of entities (molecules, atoms, etc.). Here, focus on the number of moles of each compound given in the problem.
Multiply the number of moles of each compound by the number of oxygen atoms per molecule of that compound. This will give you the total number of moles of oxygen atoms in each sample.
For H2O2, multiply the moles of H2O2 by 2 to find the moles of oxygen atoms. For N2O, multiply the moles of N2O by 1. For H2CO3, multiply the moles of H2CO3 by 3. For CO2, multiply the moles of CO2 by 2.
Summarize the results for each compound to find the total moles of oxygen atoms in each sample.

Verified video answer for a similar problem:

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.

Mole Concept

The mole is a fundamental unit in chemistry that quantifies the amount of substance. One mole contains approximately 6.022 x 10^23 entities, such as atoms or molecules. Understanding the mole concept is essential for converting between the number of moles and the number of particles, which is crucial for solving problems involving chemical reactions and stoichiometry.
Recommended video:
Guided course
01:25
Mole Concept

Chemical Formula Interpretation

Chemical formulas represent the composition of compounds, indicating the types and numbers of atoms present. For example, H2O2 (hydrogen peroxide) contains two hydrogen atoms and two oxygen atoms. By interpreting these formulas, one can determine the number of moles of specific atoms in a given number of moles of the compound, which is necessary for the question at hand.
Recommended video:
Guided course
03:13
Intepreting the Band of Stability

Stoichiometry

Stoichiometry is the area of chemistry that deals with the relationships between the quantities of reactants and products in chemical reactions. It allows chemists to calculate the amount of substances consumed and produced in a reaction based on balanced chemical equations. This concept is vital for determining the number of moles of oxygen atoms in various compounds as presented in the question.
Recommended video:
Guided course
01:16
Stoichiometry Concept
Related Practice
Textbook Question

Determine the number of moles of hydrogen atoms in each sample. a. 0.0885 mol C4H10 b. 1.3 mol CH4

3429
views
Textbook Question

How many bromine atoms are present in 12.8 g of CH2Br2?

Textbook Question

Calculate the mass (in kilograms) of chlorine in 25 kg of each chlorofluorocarbon (CFC). b. CFCl3

2576
views
Textbook Question

Calculate mass (in grams) of sodium in 8.5 g of each sodium containing food additive. a. NaCl (table salt) b. Na3PO4 (sodium phosphate) c. NaC7H5O2 (sodium benzoate) d. Na2C6H6O7 (sodium hydrogen citrate)

1921
views
Textbook Question

Write a ratio showing the relationship between the molar amounts of each element for each compound. (See Appendix IIA for color codes.) (b)

489
views
Textbook Question

Determine the number of moles of hydrogen atoms in each sample. c. 2.4 mol C6H12

1527
views