There are one antibonding molecular orbitals present in molecular orbital model of c.
The cyclobutadiene has a pi system comprised of four individual atomic p - orbital and thus should have a four pi molecular orbitals. The compound is the prototypical antiaromatic hydrocarbon with 4 
- electrons . Its rectangular structure is the result of jahn teller reaction which disorder the molecule and lowers its symmetry , converting the triplet to a singlet ground state. It is a small annulene . The delocalisation energy of the electrons of the cyclobutene is predicted to be zero .
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Answer:
Nitrate NO3
here's your answer, hope it helps you
27g x 1cm^2/2.7g = answer in cm^2
Grams cancel out
It has a double C=C bond so that means it's unsaturated, but it can also be a cyclic compound with only simple C-C bonds
