Molecules and Structures Quick Check
1 of 41 of 4 Items
Question
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:
one red ball
two black balls
six white balls
eight sticks
What do the black balls in the model represent?
(1 point)
Responses
oxygen atoms
oxygen atoms
carbon atoms
carbon atoms
hydrogen atoms
hydrogen atoms
bonds between atoms
bonds between atoms
wrong
The black balls in the model represent carbon atoms.
Molecules and Structures Quick Check
2 of 42 of 4 Items
Question
Use the model of a molecule to answer the question.
H H
| |
H — C — C — O — H
| |
H H
How many atoms of carbon does this molecule have?
(1 point)
Responses
2 atoms
2 atoms
1 atom
1 atom
4 atoms
4 atoms
6 atoms
This molecule has 2 atoms of carbon.
Which term describes the repeated arrangement of the same molecule?(1 point)
Responses
bonds
bonds
molecular model
molecular model
atoms
atoms
extended structure
The term that describes the repeated arrangement of the same molecule is "extended structure".
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
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
one gray sphere, three white spheres, one red sphere, one blue sphere
one blue sphere, four white spheres, one red sphere
one blue sphere, four white spheres, one red sphere
two red spheres, four white spheres
A correct model of methanol, CH3OH, would have one gray sphere, three white spheres, one red sphere, and one blue sphere.
I apologize for the incorrect response. Let me correct it.
A correct model of methanol, CH3OH, would have one gray sphere, four white spheres, and one red sphere.