Textbook Question
(a) Write 'true' or 'false' for each statement. (d) A mole of NaCl(s) contains 2 moles of ions
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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook
Chapter 3, Problem 30b
(b) How many bromine atoms are present in one mole of 12C?
Verified step by step guidance1
Understand the concept of a mole: A mole is a unit in chemistry that represents \(6.022 \times 10^{23}\) entities (Avogadro's number).
Identify the substance in question: The problem asks about bromine atoms in one mole of \(^{12}\text{C}\), which is carbon-12.
Recognize that carbon-12 does not contain bromine atoms: Carbon-12 is a pure element consisting only of carbon atoms.
Conclude that since carbon-12 does not contain bromine, there are zero bromine atoms in one mole of \(^{12}\text{C}\).
Reaffirm the understanding that the question is testing knowledge of chemical composition and the definition of a mole.
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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 of any substance contains Avogadro's number of entities, which is approximately 6.022 x 10²³. This concept allows chemists to convert between the mass of a substance and the number of atoms, molecules, or ions it contains.
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Mole Concept
Atomic Composition
Atomic composition refers to the types and numbers of atoms that make up a molecule or compound. In the case of bromine, it is a diatomic molecule (Br₂) in its elemental form, meaning each molecule consists of two bromine atoms. Understanding atomic composition is crucial for determining the number of atoms in a given quantity of a substance.
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Chemical Symbols and Formulas
Chemical symbols and formulas are shorthand representations of elements and compounds. For example, 'Br' represents a bromine atom, while 'Br₂' indicates a molecule of bromine containing two bromine atoms. Recognizing these symbols is essential for interpreting chemical equations and understanding the relationships between different substances.
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Related Practice
Textbook Question
What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb? How does this compare with the mass of Earth, 5.98⨉1024 kg?
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Textbook Question
Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing numbers of atoms: 0.50 mol H2O, 23 g Na, 6.0⨉1023 N2 molecules.
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Textbook Question
(a) What is the mass, in grams, of one mole of 12C?
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Textbook Question
What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb?
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Textbook Question
(a) Write “true” or “false” for each statement. (c) The mass of 1 ammonia molecule is 17.0 g.