In a Fixed-Volume Container at 25 $\degree$ C, NO₂ Gas Partially Combines to Form N₂O₄ Gas

In a fixed-volume container at 25 $\degree$ C, NO₂ gas partially combines to form N₂O₄ gas.The mass percentage of N₂O₄ in the resulting mixture is 76.3%, and the total pressure is 0.500 atm.What is the partial pressure of N₂O₄?

A) 0.619 atm
B) 0.382 atm
C) 0.192 atm
D) 0.309 atm
E) 0.119 atm