Question

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Answer 1

Answer:

Explanation:

Let's review our standard valencies:

Carbon has a valency of 4; 4 outer shell electrons.

Oxygen has a valency of 2; 6 outer shell electrons.

Hydrogen has a valency of 1; 1 outer shell electron.

From this we can we see that carbon will be the central atom. We know oxygen prefers to have a double bond, and giving carbon a double bond to oxygen leaves us with two outer shell electrons. That's just enough for one bond each to the hydrogens. The last thing to take into account is lone pairs; oxygen has four non-bonding electrons remaining in its outer shell, so it will have two lone pairs