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Ch.3 - Molecules and Compounds
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Not the one you use?Change textbook
All textbooksTro 5th EditionCh.3 - Molecules and CompoundsProblem 81c
Chapter 3, Problem 81c

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

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Identify the chemical formula of the compound: \( \text{C}_6\text{H}_{12} \).
Determine the number of hydrogen atoms in one molecule of \( \text{C}_6\text{H}_{12} \). There are 12 hydrogen atoms per molecule.
Use the given amount of moles of \( \text{C}_6\text{H}_{12} \), which is 2.4 moles.
Calculate the total number of moles of hydrogen atoms by multiplying the number of moles of \( \text{C}_6\text{H}_{12} \) by the number of hydrogen atoms per molecule: \( 2.4 \text{ mol} \times 12 \text{ H atoms/molecule} \).
The result will give you the total moles of hydrogen atoms in the sample.

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Key Concepts

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

Moles and Avogadro's Number

A mole is a unit in chemistry that represents 6.022 x 10^23 entities, such as atoms or molecules. This concept is fundamental for quantifying substances in chemical reactions and allows chemists to convert between the mass of a substance and the number of particles it contains.
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Chemical Formula Interpretation

The chemical formula of a compound provides information about the types and numbers of atoms present. For example, C6H12 indicates that each molecule contains 6 carbon atoms and 12 hydrogen atoms, which is essential for calculating the total number of hydrogen atoms in a given number of moles.
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Stoichiometry

Stoichiometry is the area of chemistry that deals with the relationships between the quantities of reactants and products in chemical reactions. It allows for the calculation of the number of moles of different elements in a compound, facilitating the determination of how many atoms are present in a sample based on its moles.
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