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Get Full Access to Fundamentals Of General, Organic, And Biological Chemistry (Mastering Chemistry) - 8 Edition - Chapter 1.12 - Problem 1.23
Get Full Access to Fundamentals Of General, Organic, And Biological Chemistry (Mastering Chemistry) - 8 Edition - Chapter 1.12 - Problem 1.23

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ISBN: 9780134015187 2044

## Solution for problem 1.23 Chapter 1.12

Fundamentals of General, Organic, and Biological Chemistry (Mastering Chemistry) | 8th Edition

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Fundamentals of General, Organic, and Biological Chemistry (Mastering Chemistry) | 8th Edition

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Problem 1.23

A sample of pumice, a porous volcanic rock, weighs 17.4 grams and has a volume of 27.3 $$\mathrm{cm}^{3}$$. If this sample is placed in a container of water, will it sink or will it float? Explain.

Text Transcription:

cm^3

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Chapter 5 Cont. 1. Valence Bond theory and hybrid orbitals a. Valence Bond theory: (Pauling); quantum mechanics based model; covalent bond = overlap of orbitals b. Hybridization: mixing atomic orbitals to generate new sets of equivalent orbitals that form covalent bonds w/ other atoms (Do not totally understand; look up video explanation…) i. Important hybrids: 1. Bent (sp): can make 1 or 2 Pi bonds (in triple bonds) 2. Trigonal Planar (sp2): can make 1 Pi bond (in double bonds) 3. Tetrahedral (sp3): make 2 Pi bonds (in single bonds) c. Sigma (σ) Bond: covalent bond having highest electron density between the two atoms along the bond axis i. Initial bond is always sigma, and any bonds after that (ex: in a double or triple bond between 2 atoms) is a Pi bond). d. Pi (π) Bond: sideways overlap of unhybridized p orbitals produces electron density above and below the bonding axis 2. Molecular Recognition: process by which molecules w/ complementary molecular shapes interact in biological systems. a. Polycyclic aromatic hydrocarbons (PAHs): planar shape allows intercalation w/ DNA (super dangerous/toxic!) b. Stereoisomerism: compounds w/ identica

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Chemistry: The Central Science : Chemical Reactions and Reaction Stoichiometry
?The reaction between reactant A (blue spheres) and reactant B (red spheres) is shown in the following diagram:

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