Question

tag all the sp³ hybridized carbon atoms in this molecule. if there are none, please check the box below. there are none.

Explanation:

Step1: Recall hybridization rule

A carbon atom is $sp^{3}$ - hybridized when it has 4 single - bonds.

Step2: Analyze the given molecule

In the molecule $H - C - C - H$ with an oxygen double - bonded to one of the carbons, the left - hand carbon has 4 single bonds (3 to hydrogen and 1 to the adjacent carbon). The right - hand carbon has a double bond to oxygen and single bonds to carbon and hydrogen, so it is not $sp^{3}$ hybridized.

Answer:

The left - hand carbon atom is $sp^{3}$ hybridized.