A 0479-G Sample of Nitrogen, Oxygen or Neon Gas Occupies a a Volume

Multiple Choice

A 0.479-g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 l Pa and 20.0 ^$\omicron$ C.What are the molar mass and identity of the gas?

A) 14.0 g.mol^-1, N
B) 32.0 g.mol^-1, O₂
C) 20.1 g.mol^-1, Ne
D) 16.0 g.mol^-1, O
E) 28.0 g.mol^-1, N₂