Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures. n2(g) + o2(g) 2no(g)the equilibrium constant kp for the reaction is 0.0025 at 2127�c. if a container is charged with 8.00 atm of nitrogen and 5.00 atm of oxygen and the mixture is allowed to reach equilibrium, what will be the equilibrium partial pressure of nitrogen? a) 0.16 atm b) 0.31 atm c) 3.1 atm d) 7.7 atm e) 7.8 atm

Answer : The correct option is, (E) 7.8 atm

Explanation :

The partial pressure of = 8.00 atm

The partial pressure of = 5.00 atm

= 0.0025

The balanced equilibrium reaction is,

Initial pressure     8.00      5.00            0

At eqm.               (8.00-x) (5.00-x)        2x

The expression of equilibrium constant for the reaction will be:

Now put all the values in this expression, we get :

By solving the terms, we get:

The equilibrium partial pressure of = (8.00 - x) = (8.00 - 0.15) = 7.8 atm

Therefore, the equilibrium partial pressure of is 7.8 atm.

i think it is true since you can test the answer and can use observations to complete it.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.