Which of the following gases has the greatest density at STP?
A) NO2 (molar mass = 46.01 g/mol)
B) Xe (molar mass = 131.3 g/mol)
C) SO2 (molar mass = 64.07 g/mol)
D) SF6 (molar mass = 146.07 g/mol)
E) All of these samples have the same density at STP.
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