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The approximate Lewis structure of CH2O is this:

H

\

C==O

/

H

It is the most basic aldehyde, often referred to as formaldehyde. The bond lengths are:

C-H bond: 1.113 Angstroms

C=O bond: 1.208 Angstroms

The measured bond angles are:

HCH: 117.46 degrees

HCO: 121.27 degrees

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