Domanda del libro di testo
The structural formulas of the compounds n-butane and isobutane are shown below. (c) Which formulas—empirical, molecular, or structural—allow you determine these are different compounds?
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Ch.2 - Atoms, Molecules, and Ions
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- 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: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 47a
What are the molecular and empirical formulas for each of the following compounds? Write the molecular formula for the following compound.
Guida verificata passo dopo passo1
Identify the molecular formula for dodecane by counting the number of carbon (C) and hydrogen (H) atoms in the structure.
For dodecane, count the carbon atoms: there are 12 carbon atoms.
Count the hydrogen atoms in dodecane: there are 26 hydrogen atoms.
Write the molecular formula for dodecane: C12H26.
For methane, count the carbon and hydrogen atoms: there is 1 carbon atom and 4 hydrogen atoms. Write the molecular formula for methane: CH4.
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Molecular Formula
The molecular formula of a compound indicates the actual number of each type of atom present in a molecule. For example, dodecane has the molecular formula C12H26, which shows it contains 12 carbon atoms and 26 hydrogen atoms. This formula provides insight into the composition of the molecule but does not convey structural information.
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02:08
Determining Molecular Formulas
Empirical Formula
The empirical formula represents the simplest whole-number ratio of the elements in a compound. For dodecane (C12H26), the empirical formula is C6H13, indicating that the ratio of carbon to hydrogen is 6:13. This formula is useful for understanding the basic composition of a compound without detailing the actual number of atoms.
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02:26Empirical vs Molecular Formula
Structural Formula
A structural formula provides a visual representation of the arrangement of atoms within a molecule, showing how atoms are bonded together. In the case of dodecane and methane, the structural formulas illustrate the linear chain of carbon atoms in dodecane and the tetrahedral arrangement of hydrogen atoms around a single carbon atom in methane. This information is crucial for understanding the chemical behavior and properties of the compounds.
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01:00Structural Formula
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The structural formulas of the compounds n-butane and isobutane are shown below. (b) Determine the empirical formula of each.
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Two substances have the same molecular and empirical formulas. Does this mean that they must be the same compound?
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Write the empirical formula corresponding to each of the following molecular formulas: (b) C8H10
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Ball-and-stick representations of benzene, a colorless liquid often used in organic chemistry reactions, and acetylene, a gas used as a fuel for high-temperature welding, are shown below. (a) Determine the molecular formula of each.
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Write the empirical formula corresponding to each of the following molecular formulas: (a) Al2Br6
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