Question 809310
find the mass and weight of the air in a living room at 20 degree Celsius with 4.0 m x 5.0 m and a ceiling 3.0 m high. what are the mass and weight of an equal volume of water?
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The volume is the product of the dimensions = 60 cubic meters.
60 m^3 * 1000 kg/m^3 = 60000 kg of water.
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You'll have to spec the density of air.