Water vapour is lighter than air so it can be _______________.

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Solution

less dense.
At 18 atomic units, water vapor is lighter than diatomic Oxygen (32 units) and diatomic Nitrogen (28 units). Thus at a constant temperature, the more water vapor that displaces the other gases, the less dense air will become. As the moist air is less dense than dry air, it rises up.

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Water vapour is lighter than air so it can be _______________.

less dense.At 18 atomic units, water vapor is lighter than diatomic Oxygen (32 units) and diatomic Nitrogen (28 units). Thus at a constant temperature, the more water vapor that displaces the other gases, the less dense air will become. As the moist air is less dense than dry air, it rises up.

less dense.
At 18 atomic units, water vapor is lighter than diatomic Oxygen (32 units) and diatomic Nitrogen (28 units). Thus at a constant temperature, the more water vapor that displaces the other gases, the less dense air will become. As the moist air is less dense than dry air, it rises up.