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Answer is: between the carbon atom and the oxygen atom in a molecule of methanal there are two (2) pairs of electrons.

Methanal or formaldehyde (H₂C=O) is the simplest of the aldehydes.
In methanal, bond between carbon and oxygen is double covalent bond (one sigma and one pi bond), which means there are four shared electrons or two pair of electrons.

Methanal is the simplest form of aldehyde. There are two pairs of shared electrons between the oxygen and the carbon atoms of methanal.

What is Methanal?

Methanal is also called formaldehyde and is the simplest form of aldehyde. It contains one carbon, one oxygen, and two hydrogen atoms in its structure. It is represented as [tex]\rm CH_{2}O.[/tex]

The carbon and the oxygen of the molecule share one sigma and one pi bond making them double covalently bonded. Thus four electrons are shared between them.

Therefore, they have two pairs of shared electrons.

Learn more about electrons here:

https://brainly.com/question/1075300

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