pls answer FAST
Q.7. A closed vessel containing $N_2{O}_4$ gas is maintained at temperature of 298 K at 1 atm pressure is heated to 500 K. At this temperature 45 % by weight of $N_2{O}_4$ decomposes to $N{O}_2$. What will be the final pressure of the gaseous mixture at 500 K?
A. 2.4 atm
B. 2.6 atm
C. 2.8 atm
D. 3.0 atm