AnswersTX-Chemistry BUnit Test

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A 1-L soda bottle contains dissolved carbon dioxide gas. Which bottle would have the highest concentration of dissolved gas?

A
a bottle that is sealed
B
a bottle that was opened 1 minute ago
C
a bottle that was opened 1 hour ago
D
a bottle that was opened 1 day ago
22
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Which statement is true about the electrons in each polar bond of a water molecule?

A
They are more attracted by the oxygen atom than by the hydrogen atom.
B
They are more attracted by the hydrogen atom than by the oxygen atom.
C
They are equally attracted by the hydrogen and oxygen atoms.
D
They are equally repelled by the hydrogen and oxygen atoms.
23

Which is the second step in the dissolving process?

A
The solute is mixed with the solvent.
B
The solute ions are carried into the solution.
C
The solvent molecules surround the solute particles.
D
The solvent molecules are attracted to solute particles or ions.
24

Water can resist a greater external force than ethanol can. Which statement best describes this difference?

A
Water has less capillary action than ethanol.
B
Water has greater capillary action than ethanol.
C
Water has lower surface tension than ethanol.
D
Water has greater surface tension than ethanol.
25

Under which conditions would the solubility of a gas be greatest?

A
high pressure and high temperature
B
high pressure and low temperature
C
low pressure and high temperature
D
low pressure and low temperature

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