# A chemistry problem by Rishabh Deep Singh

Chemistry Level 3

If the sum of $$d\pi - p \pi$$ bonds in $$\ce{SO3}$$, $$\ce{SO4^{2-}}$$ and $$\ce{ClO4^{-}}$$ and $$\ce{PCl5}$$ is $$A$$, find $$A$$.

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