Question: A large mining company was provided with a 3 0 0 0 m ^ 3 of compressed air tank. Air pressure in the tank drops

A large mining company was provided with a 3000 m^3 of compressed air tank. Air pressure in the tank drops from 700 kPa to 180 kPa while the temperature remains unchanged at 28\deg C. What percentage has the mass of air in the tank been unreduced?

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