The molecular formula H2O means
Select one:
a. 1 hydrogen atom and 2 oxygen atoms.
b. 1 hydrogen atom and 1 oxygen atom.
c. 2 hydrogen atoms and 1 oxygen atom.
d. 2 hydrogen atoms and 2 oxygen atoms.
e. None of these choices is correct.
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The correct answer is: 2 hydrogen atoms and 1 oxygen atom.
Question 2
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Hydrogen bonds are important for all of the following except:
Select one:
a. producing surface tension in water
b. helping hold a protein structure together
c. helping hold DNA strands together
d. helping atoms give up or receive electrons
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The correct answer is: helping atoms give up or receive electrons
Question 3
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In an oxidation-reduction reaction, ______ are transferred between molecules
Select one:
a. electrons
b. oxygen
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The correct answer is: electrons
Question 4
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, Heat energy is
Select one:
a. the form of energy that actually does work.
b. movement of ions or electrons.
c. energy that flows between objects with different temperatures.
d. stored energy that could do work but is not doing so.
e. energy that moves in waves.
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The correct answer is: energy that flows between objects with different temperatures.
Question 5
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Molecules that form when electrons are shared unequally between atoms are called
Select one:
a. salt molecules.
b. polar molecules.
c. nonpolar molecules.
d. lopsided molecules.
e. None of these choices are correct.
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The correct answer is: polar molecules.
Question 6
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An individual hydrogen bond in a sample of water would be described as:
Select one:
a. strong and intramolecular.
b. strong and intermolecular.
c. weak and intramolecular.
d. weak and intermolecular.
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The correct answer is: weak and intermolecular.
Question 7
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Select one:
a. 1 hydrogen atom and 2 oxygen atoms.
b. 1 hydrogen atom and 1 oxygen atom.
c. 2 hydrogen atoms and 1 oxygen atom.
d. 2 hydrogen atoms and 2 oxygen atoms.
e. None of these choices is correct.
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The correct answer is: 2 hydrogen atoms and 1 oxygen atom.
Question 2
Correct
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Question text
Hydrogen bonds are important for all of the following except:
Select one:
a. producing surface tension in water
b. helping hold a protein structure together
c. helping hold DNA strands together
d. helping atoms give up or receive electrons
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The correct answer is: helping atoms give up or receive electrons
Question 3
Correct
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Question text
In an oxidation-reduction reaction, ______ are transferred between molecules
Select one:
a. electrons
b. oxygen
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The correct answer is: electrons
Question 4
Correct
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Question text
, Heat energy is
Select one:
a. the form of energy that actually does work.
b. movement of ions or electrons.
c. energy that flows between objects with different temperatures.
d. stored energy that could do work but is not doing so.
e. energy that moves in waves.
Feedback
The correct answer is: energy that flows between objects with different temperatures.
Question 5
Correct
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Question text
Molecules that form when electrons are shared unequally between atoms are called
Select one:
a. salt molecules.
b. polar molecules.
c. nonpolar molecules.
d. lopsided molecules.
e. None of these choices are correct.
Feedback
The correct answer is: polar molecules.
Question 6
Correct
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Question text
An individual hydrogen bond in a sample of water would be described as:
Select one:
a. strong and intramolecular.
b. strong and intermolecular.
c. weak and intramolecular.
d. weak and intermolecular.
Feedback
The correct answer is: weak and intermolecular.
Question 7
Correct
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