A 250-mL cylinder filled with krypton gas at 2.6 atm and 278 K. D...

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A 250-mL cylinder filled with krypton gas at 2.6 atm and 278 K. Determine the fraction of the volume that is occupied by Kr atoms. Krypton atom has a radius of 2.02×10-8 cm. Assume that atoms are spheres.