Weight of air

A living room has floor dimensions of 3.5 m and 4.2 m 3.5 \text{ m and } 4.2 \text{ m} and a height of 2.4 m. 2.4 \text{ m.} What does the air in the room weigh when the air pressure is 1.0 atm?1.0 \text{ atm?}

The density of air is ρ=1.21 kg/m3 \rho = 1.21 \text{ kg/m}^{3} .
The gravitational acceleration is g=9.8 m/s2.g= 9.8 \text{ m/s}^{2}.

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