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A welder using a tank of volume 8.00×10−2 m3 fills it with oxygen (with a molar...

A welder using a tank of volume 8.00×10−2 m3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 2.95×105 Pa and temperature of 37.8 ∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 21.9 ∘C, the gauge pressure of the oxygen in the tank is 1.95×105 Pa.

Find the initial mass of oxygen.

Find the mass of oxygen that has leaked out.

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