Write a balanced equation with integer coefficients and the expression of the equilibrium law for each?

[bronsin]

a) At some time in the future, industry and consumers may make more extensive use of combustion of hydrogen as an energy source

b) When aqueous ammonia is added to an an aqueous nickel(II) ion solution, the Ni(NH3)6 2+(aq) complex ion is formed

c)In a sealed can of soda, carbonic acid, H2CO33(aq), decomposes to liquid water and carbon dioxide gas.