AP Chemistryhardmcq1 pt
What is the average N–O bond order in the nitrate ion, NO₃⁻ (one double bond among three equivalent structures)?
A.1.33
B.1.00
C.2.00
D.1.50
Explanation
Core Concept
Three resonance forms each place the double bond on a different oxygen, so total bonding over three positions is 4 pairs ÷ 3 bonds = 1.33. All three N–O bonds are identical in the hybrid.
Correct Answer
A1.33
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