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A welder using a tank of volume 7.10×10−2 m3 fills it with oxygen (with a molar...

A welder using a tank of volume 7.10×10−2 m3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×105 Pa and temperature of 37.6 ∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 22.4 ∘C, the gauge pressure of the oxygen in the tank is 2.00×105 Pa .

Part A

Part complete

Find the initial mass of oxygen.

m

m

=		 0.379 kg

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Significant Figures Feedback: Your answer 0.3792 kg was either rounded differently or used a different number of significant figures than required for this part.

Part B

Find the mass of oxygen that has leaked out.
m

m

=

0.1849

   kg

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