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There is a room with a known volume. The temperature and pressure are known too (STP). It is given that the window is open and there will be a pressure drop outside due to wind. I need to find the mass of air that will flow out of the room. I will be able to find the mass transferred outside since I know the molar mass of the gas.

I considered using the ideal gas law equation; PV=nRT. However there are many unknowns like T and V outside. Can you help me out?

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