When the water vapor content of a volume of gas equals its capacity, what is the relative humid-ity (RH) of this gas?
a. 80%
b. 100%
c. 40%
d. 60%
ANS: B
When the water vapor content of a volume of gas equals its capacity, the RH is 100%. When the RH is 100%, a gas is fully saturated with water vapor.
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