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Chemistry (3rd Edition)

Chemistry (3rd Edition)

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Chemistry|(3rd Edition)
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Chapter 9, Problem 84E
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Problem
Write the Lewis structures of HNNH and HNNH, Predict which molecule has the greater N-N virite tne LEWIS structures OT HNNH ana HONNH). Predict wnicn molecule nas tne greater N-N
bond energy
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First draw the main skeleton structure of NHNH with single bonds. H- N- N- H Total number of valence electrons = (2×1)+(25)
= 12 6 electrons are used to form 3 bonds in the skeleton structure. Remaining valence electrons = 12 – 6
= 6 Each of the nitrogen atoms still needs two lone pairs to complete the octet. Therefore, total 8 electrons are still needed. But we have 6 electrons in hand. Therefore, one additional bond is needed which can be placed between two nitrogen atoms. H-NEN – H Each of the nitrogen atoms still needs one lone pair to complete octet. Therefore, final Lewis structure will be as follows having no formal charge on any atom. H-NEN-H
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