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# Solution: Oxygen gas effuses at a rate that is 1.49 times that of an unknown gas (at the same temperature).  What is the identity of the unknown gas? A) Ar                     B) HBr            C) SO2             D) Cl2              E) He

###### Problem

Oxygen gas effuses at a rate that is 1.49 times that of an unknown gas (at the same temperature).  What is the identity of the unknown gas?

A) Ar

B) HBr

C) SO2

D) Cl2

E) He