A Sealed Glass Container Contains Partial Pressures of 0

A sealed glass container contains partial pressures of 0.80 atm CO₂ gas and 0.35 atm N₂ gas. What is the mole fraction of N₂ in the glass container?

A) 0.35
B) 1.15
C) 0.70
D) 0.80
E) 0.30