Which of the following are true about molecular water vapor? 1. Water vapor exhibits kinetic activity. 2. Molecular water vapor can be seen. 3. Water vapor exerts pressure
a. 1 and 2 only
b. 2 and 3 only
c. 1, 2, and 3
d. 1 and 3 only
ANS: D
To be distinguished from visible particulate water, such as mist or fog, this invisible gaseous form of water is called molecular water. Molecular water obeys the same physical principles as other gases and therefore exerts a pressure called water vapor pressure.
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