Respuesta :

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Answer:

Here's what I get  

Explanation:

1. Formaldehyde

C-H:  ΔEN = |2.55 - 2.20| = |0.35|  = 0.35

C-O:  ΔEN = |2.55 - 3.44| = |-0.89| = 0.89

2. Ammonia

N-H: ΔEN = |3.04 - 2.20| =|0.84| = 0.84