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Which gas effuses faster, He or Ar, and how much faster does it effuse? (a) He effuses 9.98 times as fast as Ar. (b) He effuses 3.16 times as fast as Ar. (c) Ar effuses 9.98 times as fast as He. (d) Ar effuses 3.16 times as fast as He. (e) He and Ar effuse at the same rate.