The Pressure of N₂O is  1.48 atm
Explanation:
Given:
Gas samples containing NO, Nâ‚‚O, NOâ‚‚.
Total pressure of the gas mixture = 4.68 atm.
The pressure of NO Â = 501.6 mm Hg.
The pressure of NOâ‚‚ = 2.54 atm.
To Find:
The Pressure of Nâ‚‚O
Solution:
Total pressure = Pressure of NO + Pressure of NOâ‚‚+ Pressure of Nâ‚‚O
So pressure of Nâ‚‚O = Total pressure - ( Pressure of NO + Pressure of NOâ‚‚)
                = 4.68 atm - (0.66 atm + 2.54 atm)
                = 4.68 atm - 3.2 atm
                = 1.48 atm
Thus the Pressure of N₂O is  1.48 atm