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Praxis II General Science

Category - Major Ideas

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The vapor pressure at the surface of boiling water is equal to:

The temperature of the water.
10 atmospheres.
1 atmosphere.
A percentage of the molarity of the water.
The heat of vaporization of the water.

Explanation

Answer: C - When the vapor pressure is equal to atmospheric pressure, or 1 atm, a solution will boil. Thus, if water is boiling, the vapor pressure above the water must be 1 atm.

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