Ethyl acetate, $C_4{H}_8{O}_2,$ is a fragrant substance used both as a solvent and as an aroma enhancer. Its Lewis structure is $($Figure $1).$

Part B

What is the total number of valence electrons in ethyl acetate?

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Part C

How many of the valence electrons are used to make $$ bonds in the molecule?

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Part D

How many valence electrons are used to make $$ bonds?

Express your answer as an integer.