The correct answer is- The black balls represent carbon atoms.
Molecular models are three dimensional representations of a a molecule that enables us to visualize the molecule.
Molecules are represented by three dimensional models. These models help us to really have a firm grasp of what the molecule should look like.
In this particular question, we are told that ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom.
Also, we have; one red ball two black balls six white balls eight sticks What do the black balls in the model.
This implies that the two black balls must represent carbon atoms from the information provided.
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