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Get Full Access to Fundamentals Of General, Organic, And Biological Chemistry (Mastering Chemistry) - 8 Edition - Chapter 5 - Problem 5.17
Get Full Access to Fundamentals Of General, Organic, And Biological Chemistry (Mastering Chemistry) - 8 Edition - Chapter 5 - Problem 5.17

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ISBN: 9780134015187 2044

## Solution for problem 5.17 Chapter 5

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 5.17

Reaction of A (green spheres) with B (blue spheres) is shown in the following diagram:

Which equation best describes the reaction?

(a) $$\mathrm{A}_{2}+2 \mathrm{~B} \longrightarrow \mathrm{A}_{2} \mathrm{~B}_{2}$$

(b) $$10 \mathrm{~A}+5 \mathrm{~B}_{2} \longrightarrow 5 \mathrm{~A}_{2} \mathrm{~B}_{2}$$

(c) $$2 \mathrm{~A}+\mathrm{B}_{2} \longrightarrow \mathrm{A}_{2} \mathrm{~B}_{2}$$

(d) $$5 \mathrm{~A}+5 \mathrm{~B}_{2} \longrightarrow 5 \mathrm{~A}_{2} \mathrm{~B}_{2}$$

Text Transcription:

A_2 +2 B arrow right A_2B_2

10 A +5 B_2 arrow right 5 A_2B_2

2 A + B_2 arrow A_2B_2

5 A +5 B_2 arrow right a_2 b_2

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Monday Apr. 1: Exam, no notes taken.  Exceptions to the Aufbau Principle o Exceptions: electron configurations with 5 or 10 d electrons are preferred over only 4 or 9 o Hund's rule  Compares paired and separated electron spins  Elements Z=21 through Z=30 have occupied d-orbitals o D orbital drops below s orbital  3d orbital is lower in energy than the 4s  Having a half-filled d orbital is more electronically favored than than 4 electrons  Electron Configurations & Families of Elements o Groups have similar electron configurations o Noble Gases (group VIIIA)  All shells are filled  Very unreactive elements  Atomic gases  Each ending orbital are filled in noble gases o Alkaline Earth Metals (group IIA)  2 electrons in the outer shell 2  Moderately reactive: [filled shell] s  Configurations and the Periodic Table o Valence electrons  Electrons of the outermost shell of an atom  Electrons are "outside" the noble gas core  Define chemical reactivity  Elements of a group have the same "valence shell configuration" --> similar chemical properties of elements within a group  Electron configuration of

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