To calculate the bond order and bond length of the N-O bond in the nitrite ion NO2- , we need to consider the resonance structures of the ion.Resonance structures of NO2-:Structure 1: O-N=OStructure 2: O=N-OIn both structures, there is one single bond and one double bond between the nitrogen and oxygen atoms. The bond order is the average of the bonds in these two structures.Bond order = 1 + 2 / 2 = 1.5Now, let's find the bond length. The bond length of a molecule is inversely proportional to the bond order. The typical bond lengths for N=O and N-O are 1.21 and 1.41 , respectively.To find the average bond length, we can use the following formula:Average bond length = 1.21 + 1.41 / 2 = 1.31 So, the bond order of the N-O bond in the nitrite ion NO2- is 1.5, and the bond length is 1.31 .