on average air contain .........%of water vapour
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aprox. 4% of water vapour
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The correct answer is - 4% of the mass of the air.
The amount of water vapour in the atmosphere is called as Absolute humidity.
At normal temperature, i.e, at a temperature of about 30 °C (86 °F), a specific volume of air can hold up to 4% of water vapour. The water vapour content is relative to the humidity in the air.
So, when the water vapour content increases, the humidity increases and then it condenses to form rain.
The amount of water vapour in the atmosphere is called as Absolute humidity.
At normal temperature, i.e, at a temperature of about 30 °C (86 °F), a specific volume of air can hold up to 4% of water vapour. The water vapour content is relative to the humidity in the air.
So, when the water vapour content increases, the humidity increases and then it condenses to form rain.
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