Find the mass and weight of the air at $20^{\circ} C$ in a living room with a $4.0 m \times 5.0 m$ floor and a ceiling 3.0 m high, and the mass and weight of an equal volume of water. (Unit: 10 ^ 5 N)
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Find the mass and weight of the air at $20^{\circ} C$ in a living room with a $4.0 m \times 5.0 m$ floor and a ceiling 3.0 m high, and the mass and weight of an equal volume of water. (Unit: 10 ^ 5 N)
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