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Moist air is less dense than dry air at ...

Moist air is less dense than dry air at the same temperature and barometric pressure. Which is the best explanation for this observation?

A

`H_(2)O` is a polar molecule but `N_(2)` and `O_(2)` are not.

B

`H_(2)O` has a higher boiling point than `N_(2)` or `O_(2)`.

C

`H_(2)O` has a lower molar mass than `N_(2)` or `O_(2)`.

D

`H_(2)O` has a higher heat capacity than `N_(2)` or `O_(2)`.

Text Solution

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The correct Answer is:
c
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