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spherical container o.75 m in diameter, which is enclosed within a second thin-walled, spherical container 1.1 m in diameter. The opaque, diffuse, gray container surfaces have an emissivity of o.o5

and are separated by an evacuated space. If the outer surface isat 280 K and the inner surface is at 90 K, what is the mass rate of oxygen lost due to evaporation? (The latent heat of vaporization of oxygen is 2.13 x 105 J/kg.)охудen

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