The equilibrium of 2h 2 o(g) 2h 2 (g) + o 2 (g) at 2,000 k has a keq value of 5.31 x 10-10. what is the keq expression for this system? (enter subscripts after the letters: for example, h2o = hs2o. also, dont forget to use proper chemical shorthand for chemical symbols. for instance, chlorine = cl but not cl or cl.)

Answer : The equilibrium constant expression will be,

Explanation :

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

As we know that the concentrations of pure solids are constant that is they do not change. Thus, they are not included in the equilibrium expression.

The given balanced chemical reaction is,

So, the equilibrium constant expression will be,

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."