At a certain temperature, 0.780 mol SO 3 0.780 mol SO3 is placed in a 4.00 L 4.00 L container. 2 SO 3 ( g ) − ⇀ ↽ − 2 SO 2 ( g ) + O 2 ( g ) 2SO3(g)↽−−⇀2SO2(g)+O2(g) At equilibrium, 0.100 mol O 2 0.100 mol O2 is present. Calculate K c .

0.00297

Explanation:

Moles of   = 0.780 mole

Volume of solution = 4.00 L

Initial concentration of =

Equilibrium concentration of =

The given balanced equilibrium reaction is,

Initial conc.         0.195 M            0 M       0 M

At eqm. conc.     (0.195-2x) M   (2x) M   (x) M

The expression for equilibrium constant for this reaction will be,

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

Given = x = 0.025 M

Thus is 0.00297

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.