A molecule of ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom. A ball-and-stick model of a molecule of ethanol is made from the following components:

Question

one red ball
two black balls
six white balls
eight sticks

What do the black balls in the model represent?

(1 point)
Responses

carbon atoms
carbon atoms

oxygen atoms
oxygen atoms

hydrogen atoms
hydrogen atoms

bonds between atoms

Answer 1

The black balls in the model represent carbon atoms.

Answer 2

Molecules and Structures Quick Check
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Question
Use the model of a molecule to answer the question.

H H

| |

H — C — C — O — H

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H H

How many atoms of carbon does this molecule have?

(1 point)
Responses

4 atoms
4 atoms

2 atoms
2 atoms

6 atoms
6 atoms

1 atom

Answer 3

This molecule has 2 atoms of carbon.

Answer 4

Which term describes the repeated arrangement of the same molecule?(1 point)
Responses

molecular model
molecular model

atoms
atoms

bonds
bonds

extended structure

Answer 5

The term that describes the repeated arrangement of the same molecule is "extended structure".

Answer 6

Molecules and Structures Quick Check
4 of 44 of 4 Items

Question
Use the table to answer the question.

Atom Color in
Molecular Model
hydrogen (H) white
oxygen (O) red
nitrogen (N) blue
carbon (C) gray
Which option correctly describes a model of methanol, CH3OH?

(1 point)
Responses

two red spheres, four white spheres
two red spheres, four white spheres

one blue sphere, four white spheres, one red sphere
one blue sphere, four white spheres, one red sphere

one gray sphere, four white spheres, one red sphere
one gray sphere, four white spheres, one red sphere

one gray sphere, three white spheres, one red sphere, one blue sphere

Answer 7

The correct option that describes a model of methanol, CH3OH, is "one gray sphere, three white spheres, one red sphere, one blue sphere."