The pressure of NO2 and N2O4 would be 1.756 atm and 0.1542 atm respectively.
<h3>Gas laws</h3>
According to Boyle's law, the pressure of a gas is inversely proportional to its volume at a constant temperature.
Mathematically: P1V1=P2V2
When the volume of a gas is halved at a constant temperature, the pressure is doubled. If it is the volume is doubled, the pressure would be halved.
In this case, the volume of the container is halved. Meaning that the pressure of each of the gas would be doubled by the time the equilibrium is reestablished.
Thus, NO2 would double from 0.878 atm to 1.756 atm while N2O4 will double from 0.0771 atm to 0.1542 atm
More on gas laws can be found here: brainly.com/question/1190311